biblatex-dw bibliography formatting @incollection volume number after series name

Question

In order to meet the publication criteria for a book, I need some custom formatting for the bibliography, especially @incollection items:

Here is an MWE:

\documentclass{book}
\usepackage{a4wide}
\usepackage{fancyhdr}
\usepackage{graphicx}
\usepackage{polyglossia}
\setmainlanguage[spelling=new,babelshorthands=true]{german}
\usepackage[autostyle]{csquotes}
\usepackage[style=authortitle-dw,
edsuper=true,
namefont=smallcaps,
useprefix=true,
ibidemfont=smallcaps,
idemfont=smallcaps,
idembibformat=dash,
shorthandibid=true,
backref=false,
backrefstyle=none,
hyperref=true,
isbn=false,
backend=biber,
citereset=chapter,
bibencoding=utf8]{biblatex}
\DeclareFieldFormat{pages}{#1}
\DeclareFieldFormat{page}{#1}
\DeclareNameAlias{sortname}{last-first}
\DefineBibliographyStrings{german}{
    and={/},
    page={},
    andothers = {{et\,al\adddot}},
    editor = {{ Hg\adddot }} ,
    editors = {{ Hg\adddot }}
}


\usepackage{filecontents}
\begin{filecontents}{file.bib}

    @book{b2,
        year = {2014},
        title = {Redefreiheit: Öffentliche Debatten der Bevölkerung im Herbst 1989},
        address = {Leipzig},
        edition = {1. Aufl.},
        publisher = {Leipziger Uni-Vlg},
        isbn = {386583888X},
        editor = {Ahbe, Thomas and Stiehler, Volker and Hofmann, Michael},
        shorttitle = {Redefreiheit}
    }

    @incollection{bauer,
        xref = {schwobel},
        author = {Bauer, Gisa},
        title = {Transformationen des Religiösen: Die historisch-materialistische Geschichtsschreibung in der DDR als Heilsgeschichte},
        volume = {39},
        series = {VWGTh},
        editor = {Schwöbel, Christoph},
        booktitle = {Geschichte und Gott},
        address = {Leipzig},
        shorttitle = {Transformationen}
    }

    @book{schwobel,
        title = {Geschichte und Gott: XV. Europäischer Kongress für Theologie},
        address = {Leipzig},
        volume = {39},
        series = {VWGTh},
        editor = {Schwöbel, Christoph},
        shorttitle = {Geschichte}
    }
    @book{bulischop.2006,
        author = {Bulisch, Jens},
        year = {2006},
        title = {Evangelische Presse in der DDR},
        address = {Göttingen},
        volume = {43},
        publisher = {Vandenhoeck und Ruprecht},
        isbn = {3525557442},
        series = {AKZG},
        shorttitle = {Presse}
    }
\end{filecontents}

\addbibresource{file.bib}
\begin{document}
    text \footcite{bulischop.2006} text.
    text \footcite{bauer} haha. 
    \printbibliography
\end{document}

I would need the following change to bibliography formatting see picture:

1. For books with a series: the volume number should be placed after the series name, but inside the round brackets (i.e. (AKZG 43)).

Answer 1

For the number in a series use the number field (and not the volume field).

@collection{schwobel,
  title      = {Geschichte und Gott: XV. Europäischer Kongress für Theologie},
  address    = {Leipzig},
  number     = {39},
  series     = {VWGTh},
  editor     = {Schwöbel, Christoph},
  shorttitle = {Geschichte},
}
@book{bulischop.2006,
  author     = {Bulisch, Jens},
  year       = {2006},
  title      = {Evangelische Presse in der DDR},
  address    = {Göttingen},
  number     = {43},
  publisher  = {Vandenhoeck und Ruprecht},
  isbn       = {3525557442},
  series     = {AKZG},
  shorttitle = {Presse},
}

BTW: bauer can be made shorter with crossref instead of xref

@incollection{bauer,
  crossref   = {schwobel},
  author     = {Bauer, Gisa},
  title      = {Transformationen des Religiösen},
  subtitle   = {Die historisch-materialistische Geschichtsschreibung in der DDR als Heilsgeschichte},
  shorttitle = {Transformationen}
}

You will also want to use

\DeclareNameAlias{sortname}{family-given}
\DefineBibliographyStrings{german}{
    andothers = {et\,al\adddot},
    editor    = {Hg\adddot} ,
    editors   = {Hg\adddot}
}

---

MWE

\documentclass{book}
\usepackage{polyglossia}
\setmainlanguage[spelling=new,babelshorthands=true]{german}
\usepackage[autostyle]{csquotes}
\usepackage[style=authortitle-dw,
edsuper=true,
namefont=smallcaps,
useprefix=true,
ibidemfont=smallcaps,
idemfont=smallcaps,
idembibformat=dash,
shorthandibid=true,
backref=false,
backrefstyle=none,
hyperref=true,
isbn=false,
backend=biber,
citereset=chapter,
bibencoding=utf8]{biblatex}
\DeclareFieldFormat{pages}{#1}
\DeclareFieldFormat{page}{#1}
\DeclareNameAlias{sortname}{family-given}
\DefineBibliographyStrings{german}{
    andothers = {et\,al\adddot},
    editor    = {Hg\adddot} ,
    editors   = {Hg\adddot}
}


\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}

    @book{b2,
        year = {2014},
        title = {Redefreiheit: Öffentliche Debatten der Bevölkerung im Herbst 1989},
        address = {Leipzig},
        edition = {1. Aufl.},
        publisher = {Leipziger Uni-Vlg},
        isbn = {386583888X},
        editor = {Ahbe, Thomas and Stiehler, Volker and Hofmann, Michael},
        shorttitle = {Redefreiheit}
    }

@incollection{bauer,
  crossref   = {schwobel},
  author     = {Bauer, Gisa},
  title      = {Transformationen des Religiösen},
  subtitle   = {Die historisch-materialistische Geschichtsschreibung in der DDR als Heilsgeschichte},
  shorttitle = {Transformationen}
}

@collection{schwobel,
  title      = {Geschichte und Gott: XV. Europäischer Kongress für Theologie},
  address    = {Leipzig},
  number     = {39},
  series     = {VWGTh},
  editor     = {Schwöbel, Christoph},
  shorttitle = {Geschichte},
}
@book{bulischop.2006,
  author     = {Bulisch, Jens},
  year       = {2006},
  title      = {Evangelische Presse in der DDR},
  address    = {Göttingen},
  number     = {43},
  publisher  = {Vandenhoeck und Ruprecht},
  isbn       = {3525557442},
  series     = {AKZG},
  shorttitle = {Presse},
}
\end{filecontents}

\addbibresource{\jobname.bib}
\begin{document}
    text \footcite{bulischop.2006} text.
    text \footcite{bauer} haha. 
    \printbibliography
\end{document}