git shortlog -sn
The dig's census: who dug, and how many times.
shortlog groups history by author; -s reduces each one to a count and -n sorts from largest to smallest. One line per person, and the whole repository becomes a census.
It is how you meet a freshly cloned project — who its de facto keepers are — and how you slice it: with --since and a path at the end, the question becomes "who tended this folder this year?". The .mailmap file unifies the aliases of anyone who committed under several names.
$ git shortlog -sn --no-merges
212 Andrey Andrade
38 Ana Ribeiro
5 Rafael Costa