Several weeks. Usually I shower before leaving the house so when I was too depressed and anxious to leave the house I felt no reason to take one. But I don’t shower as much as most people in general. Once a week maybe unless I’m sweaty or dirty. I also brush my teeth inconsistently. But I’ve never had a cavity, fungal infection or anything else hygiene related anywhere on my body. I also don’t stink in case you’re wondering 😅 I disinfect my pits and use deodorant daily, I always check myself and my clothes and I also ask friends sometimes to be sure.