How often should I get laser hair removal treatments?

Hello. Shaving has become a hassle lately, so I am considering starting hair removal. Since this is my first time, I have many questions, so I am writing to inquire. I have heard that laser hair removal is not a one-time procedure but requires multiple sessions, so I am curious about the typical interval between treatments. My schedule tends to be erratic, so it might be difficult to visit on a fixed date every time. I would like to know if it is acceptable to have a gap of a few days between sessions. I am also wondering if the next treatment date is scheduled based on changes in hair growth rate during the sessions. Additionally, I would like to know when the hair starts to noticeably decrease as the number of treatments increases. I would appreciate a consultation regarding laser hair removal procedures, specifically asking if the clinic determines the appropriate treatment cycle based on an individual's hair condition.