How often do you usually get your next Botox injection?

I am planning to get square jaw Botox for the first time, and I am wondering what the most effective treatment interval is.

People around me say I should get it before the effect wears off,

I am being cautious because I have heard that too frequent Botox treatments can lead to resistance.

It seems that the appropriate Botox interval is usually considered to be around 4 to 6 months, but does exercising a lot shorten this interval?

I am wondering how to adjust the Botox injection cycle based on individual muscle mass to ensure the safest approach while maintaining the cosmetic effects for a long time.

Please share some tips on the Botox injection schedule.