system
A chat on subreddit /r/NoStupidQuestions
human
One day/24 hours. 

The real question is, for people who wear bras, how many days do you wear them before you wash them (not consecutively necessarily lol)
gpt
I don't get a lot of boob sweat (itty bitty titty committee lol) so I basically just alternate between two everyday bras and wash them ~once a week when I do the rest of my laundry. Sports bras I wash after every wear because they cover more of my body and obviously get sweatier, plus i just buy cheap ones that can be thrown in the laundry with the rest of my undies. I have a strapless bra that I wear maybe once a year with certain formal dresses and I have to admit, I can't remember the last time I washed that thing 😳