For me, it's every single evening without fail (unless I'm unwell or there's some hot water issue!). I've done this for as many years as I can remember.
It's not a bath to get clean so I'm not talking about that .. I shower every morning and wash my hair then. This is just to relax and read or look at my phone. I have many bottles of various oils / bubbles/ salts and spend about 45 mins in there