What is the typical interval for square jaw Botox?

Hi~ I'm looking for information to try a cosmetic procedure for the first time, and since the Maypure Hongdae branch had good reviews, I've booked a consultation for square jaw Botox. Haha. I tend to grind my teeth while sleeping and I like chewy foods, so maybe that's why my jaw muscles developed a lot at some point. ㅜㅜ Every time I look in the mirror, my square jaw makes my face look big and gives me a harsh impression, so I'm really worried. lol

I see so many of my friends getting Botox, and everyone says that once you start, you have to get it regularly for the rest of your life. I’ve decided to get Botox at Maypure Hongdae to get rid of my wide, chubby face, but I’m posting this because I’m curious how everyone usually schedules their Botox treatments.

I looked it up online, and some people say you need to get it every three months to maintain the effect, while others say once every six months is enough, so I'm not sure what the standard is. I also heard that getting it too often can lead to Botox resistance, so I'm getting a bit scared. Should I go back when my jaw muscles start to really flare up again? Haha.

Also, it seems like Maypure Hongdae has various types of Botox, both domestic and imported. To avoid developing resistance, would it be better to definitely get the more expensive imported one? I've heard that domestic Botox is effective too, but since it's my first time, I'm having trouble deciding.

Since it's my first time, I'm worried about even the smallest things and have tons of questions haha. I really need some advice in the comments from those with experience on how often you should get injections to maintain a slim jawline best haha. I'm looking forward to it because there are so many reviews saying the Maypure Hongdae branch is friendly. I can't wait to get it done and get rid of this square jaw stress haha.