What is the best schedule for frown line Botox?

I have a bad habit of unconsciously frowning a lot, so I’ve developed really deep wrinkles between my eyebrows, shaped like the Chinese character for "river" (川). ㅠㅠ I’m only in my late 20s, but every time I apply makeup, foundation gets stuck in these wrinkles, making me look so much older and really stressed out. Haha. I’m worried that if I leave it like this, it will leave a permanent scar, so I’m thinking of finally taking the plunge and going to the doctor. On the area between my eyebrows... Botox I'm curious if getting it definitely fixes my frowning and smooths out my wrinkles! But since it's around the eyes, I've heard scary stories that if you get it done wrong, it makes it difficult to open your eyes or your expression looks really unnatural, so I'm super scared ㅠㅠ Usually, to smooth out wrinkles completely... Botox I would also like to know the appropriate interval for injections after the first one, haha. Since I have severe frown lines like me... Botox I would be really grateful if those of you who have been hit could leave some genuine testimonies before you go.