Mine had a bath once a week when small, with his face, grubby hands, bum, etc getting a flannel when they needed it.
It's really hard water here, and he didn't smell (even though he walked an hour and a half every day, as well as tearing around the park after school), so it was quite enough.
Now as a teenager he has a bath every other day. He has a clean shirt and clean underwear (obvs) every day.
I read an article by a historical re-enactor who did an experiment: she didn't bathe at all day to day, as would have been the case in the period she studied, but rubbed herself with a dry cloth, and had a clean chemise every day (although the same outer clothes). Her colleague had a shower every day, with deodorant, soap, etc, but wore the same clothes. Their colleagues verified that he absolutely stank after a couple of weeks, despite the daily bathing, but she didn't. (I think that was broadly the conclusion they came to - I'll try and find the article.)