Git count filtered commits

Question

Is it possible to get a number of git commits filtered by commit-message?

$ git log --all --grep='SEARCH_STRING'  

With this snippet I get a list of all commits with the searched string. But I got a lot of commits and its hard to count this by Hand.

Is there a way git tells me the sum of the commits in this list?

Answer 1

I think I found it

$ git rev-list --all --grep='SEARCH_STRING' --count

Thanks to @Inian for the tip with --count.