I am writing my master's thesis and noticed that the spacing when using fractions is very small. T
\begin{equation} \label{ASF}
f_{ij}^{t}=\dfrac{\sum_{d=1}^{365}(Unique\; daily-user\; searches\; for\;
i\; and\; j)_d}{\sum_{d=1}^{365}(Unique\; daily-user\; searches\; for\; i\;
and\; any\; firm\; j \neq i)_d}
\end{equation}
Can someone help? I am using the equation
environment for to labeling.