I used to do it like every 3-4 months most of my life. But recently I've had it done more often and I like the result. Actually I'm going to call my hairdresser to my home tomorrow. In my area, it's allowed that hairdressers visit clients at home. It's going to be after about 6-7 weeks.
My hair is short and extremely weak and thin. Fun fact, I'm a female and go to a cheap men's barber. Female hairdressers are much more expensive and often do worse job than the one for men. And a massive plus - no gossip! Absolute, peaceful silence the entire time 😁