How long does the effect of jaw Botox usually last?

Hello, I am a male office worker.

I've been thinking about getting Botox lately. Perhaps because I usually like chewy foods like squid and dried seafood, my jaw muscles seem to be noticeably developed.

I am considering jaw Botox because the angular part of my chin stands out every time I look in the mirror. I’ve heard that it is a relatively simple procedure since it involves injections, but I am wondering if the satisfaction rate is generally high even for men.

I would also like to know the typical characteristics of how the effects appear after a Botox injection and when it takes for the skin to fully settle. Additionally, I would appreciate advice from those with experience regarding approximately how many months the effects last after a single injection.