I'm planning to get laser hair removal for my underarms and upper lip. How long should I expect the procedure to take?

Now that the weather is getting warmer and we are wearing shorter clothes, I think it is time to finally start the laser hair removal treatments I have been putting off. Shaving with a razor at home every time has made my skin rough, and dark spots quickly appear on my upper lip and underarms, making me look very messy. So, I am planning to take this opportunity to visit a dermatologist and get a proper laser hair removal treatment.

As a working professional, I plan to visit quickly during weekday evenings after work. I am curious about the actual laser hair removal procedure time when treating both the philtrum and underarms simultaneously. Excluding waiting time, could you tell me how many minutes it takes purely from the moment I enter the room until the treatment is finished? I am asking this because if it takes a short time, I would like to book an appointment without any pressure.