How long does the effect of laser hair removal last?

I usually pay a lot of attention to self-care, but I am concerned that doing hair removal at home every time is a hassle and seems to irritate my skin. My skin is particularly sensitive, so I frequently get cuts from razor blades or breakouts; therefore, I am now considering getting a semi-permanent hair removal treatment.

I am wondering how many laser hair removal sessions are typically required to maintain smooth skin for a long time. I’ve heard that it is difficult to see dramatic changes with just one or two sessions, so how should I schedule treatments to achieve the most efficient results? (This is based on the calves.)

I would like to prepare in advance before summer arrives. I would appreciate it if those who have actually experienced this could share their satisfaction levels regarding pain and post-procedure care. I would like to take this opportunity to get rid of the hassle and manage my skin neatly.