How many sessions of dermatology toning laser treatment do I usually need to see results?

I have quite a few small freckles and blemishes on my face, and my complexion is generally on the dull side, so I'm thinking of taking this opportunity to get some toning treatments! I've heard that you don't see results after just one or two sessions and need to get them consistently. Usually, how many sessions do you need to start seeing enough results for people to tell you your face looks clearer? If anyone has tried this before, please share some real reviews or let me know the treatment schedule.