Regarding the wrinkle Botox cycle, how often should I get injections for wrinkles around the mouth and between the eyebrows?

Now that I'm in my mid-40s, I'm worried about my sagging jawline, but lately, the wrinkles around my mouth when I smile and the lines between my eyebrows are more noticeable.

I often hear that I look tired because there are vertical lines between my eyebrows even when I have a blank expression.

So, I am considering getting wrinkle Botox for the first time.

I looked it up, and the principle is that it reduces muscle movement to minimize facial wrinkles. I heard that the effects usually last for a few months, so many people get it periodically.

At first, I'm a little worried because I heard that adding too much might make the facial expression look awkward.

① I am curious about the typical interval for wrinkle Botox injections, based on the area between the eyebrows and around the mouth.

② I also feel like the corners of my mouth are drooping, and I would like to know if this can also be improved with a wrinkle Botox treatment.

③ What should I mention during the consultation to ensure my facial expression doesn't look unnatural when I get the first injection?

I inquired about lifting for my jawline last time, and I am asking this time because I would like to start by addressing my wrinkles.