Please recommend a Botox injection schedule to slim down my square jaw.

Perhaps because I have a bad habit of clenching my teeth while sleeping, the muscles under my ears and jaw have developed quite a bit of volume. When I look in the mirror from the front, my lower face stands out broadly and squarely, making my overall impression look very rough. I've tried massaging diligently with Gua Sha, but since it's muscle, it hasn't shrunk at all, so I'm planning to start Botox treatments, which are said to be the most cost-effective! Is it generally considered standard practice to get Botox every few months to maintain a smooth V-line for a long time? I'm worried about developing resistance if I get it too often, so please share any tips or experiences regarding the optimal Botox interval to maintain muscle reduction for a long period without side effects. !