How often should I get square jaw Botox to maintain the results?

Hello~ Lately, every time I look in the mirror, it feels like my jaw muscles have flared up again, maybe because I've been chewing tough foods so often ㅠㅠ!! It feels like the defined lines I had before are gradually sagging, so I'm thinking of visiting Maypure for a consultation on square jaw Botox. I'm really curious about how long the effects of square jaw Botox usually last!! I want to get it regularly before the lines become dull again, so I want to know the minimum interval of months I should schedule for injections to maintain a slim line for a long time without worrying about resistance!! Also, when should I start being careful about eating hard foods after the procedure? Please share your honest advice and tips from members who have received this treatment~~!!