Where can I find summary data for how common certain mutation *types* are? I'd like to know how common certain mutation types are in public data sets like the 1000 Genomes, ExAC, and ESP6500. Specifically, I'd like to know the distribution of stop-gains, stop-losses, frameshift, and other mutation types. For example, what is the median number of stop-gains observed across individuals in the ExAC population? I'd like to have the full distribution, but median values would work.

To be clear, I am not looking for allele frequencies.

I didn't find this kind of summary data when I looked at the respective websites. Is there a good source for these summary data?
This dbsnp github repo seems to offer that information.

https://github.com/ncbi/dbsnp/tree/master/Build%20Announcements/151