How often do you schedule your maintenance laser hair removal?

Hello, I am writing to ask a question regarding the laser hair removal cycle. I have had laser hair removal on my underarms about 15 times, so hair hardly grows back. However, whenever I notice hair starting to grow back, I get a separate laser hair removal session.

I'm curious about the frequency of laser hair removal treatments for maintenance like this. Is it still meaningful even if it isn't strictly every month? Since the standard cycle for laser hair removal is monthly, I feel like it's a waste of money to keep doing it that way. I would appreciate any advice on how those of you who get treatments for maintenance manage your schedule!