Statistics on key signatures

[Imaginatorium]

I am looking for statistics on key signatures, specifically to compare the frequency of enharmonic minors like Db and C#. Is there currently any way of extracting this info from the imslp collection? (Apologies if there is and I just missed it.)

TIA,
Brian Chandler

[Notenschreiber]

There are categories for each key, where you can see the total number of pieces withn that key. (Type c major for example in the search window of the main page).
But you should know, that a piece only occurs in the category if the uploader (or someone else) has used a template (for example {{key|C}}) to indicate the key.

[jossuk]

Aside from Notenschreiber's helpful comment, it seems that one would have to know quite a bit of music to efficiently organize the search. For instance, since the enharmonic relationship of D-flat (major) and C-sharp (minor) was mentioned, the Chopin "Raindrop" Prelude comes to mind as an obvious (to me) example. But what would be meant by "frequency" of occurrence? And, out of curiosity, why the interest in such an exploration?