I've gotten jaw Botox about 3 times in total~ I got it with intervals of about 4-5 months.
I had a fair amount of jaw muscle, so I saw results the first time I got it, and friends around me saw me and got it themselves too lol During the consultation, they said that if you get jaw Botox a few times regularly, the effect would gradually last longer? something like that. It's been about a year since I got it around 3 times and then stopped, but I don't think the muscle comes back as much as before. Still, I'm going to get it one more time lol