The PDF I attached in this post is breaks down the 556 keyboard sonatas of Domenico Scarlatti by key and quality.

Given the time period Scarlatti composed in, and the tuning systems he composed in, there is nothing too surprising, but it is interesting to take a look at some of the key signatures that Scarlatti only wrote a couple sonatas in. It makes one quite curious for the context behind their composition.

Any insights or questions are welcome below~