Typically once every other day, depending. I spend most of my average work week inside at home, and my very thin hair responds much better when I only wash it every 2-3 days. If I’m going out or otherwise get dirty/smelly, it’s cleaning time regardless.
It’s unfortunately a valid “defeatist” point that I hate finding myself falling back into over and over on so many issues. It shouldn’t be so hard to say ‘yo can you stop taking advantage of me for personal financial gain in every possible scenario’?