What is the recommended frequency for Botox?

Lately, every time I look in the mirror, I'm bothered by wrinkles and tight muscles, so I'm looking into Botox. I'm wondering what the recommended frequency is. I've heard that once you start getting Botox, you have to get it for the rest of your life, which is a bit scary. I've also heard that getting it too often leads to resistance and eventually loses its effectiveness, so I can't bring myself to make a decision right away. I know it varies by area, but I'm curious how many times a year is generally appropriate and how often everyone else manages their routines. I'm planning to try just one or two times at first, but I'm also worried that if I stop getting it later, my skin might sag more or my wrinkles might deepen. Ugh... If anyone has received it consistently and has tips on the frequency or number of sessions to see results without side effects, please share them. I'm posting this because I want to know this beforehand before going to the clinic. I would appreciate it if you could let me know in the comments how you all manage your Botox care.