Interesting jump in "crap" right after the start of the global COVID-19 pandemic. Perhaps being cooped up inside the house hacking on the kernel is less fun when that's your only choice.

It's actually because someone with "crap" as a substring of their e-mail address made a bunch of contributions with their e-mail address in it (e.g. in maintainer records and copyright notices) around that time. Nothing to do with COVID-19.

See the graph with the entire domain for comparison: https://www.vidarholen.net/contents/wordcount/#crapouillou

incredible!

I guess the lesson here is to never take a chart at face value. :)