Botox schedule

I received Botox.

The effects after the treatment were really good.

I aligned my eyebrows.

The glabellar lines disappear, and I am satisfied.

But is that the expiration date?? How long will the effect last..

Just having the same mind makes me want to hit faces here and there.

I want to do this and that at the dermatology clinic, but

Realistically, that's not really working out~~

Is it enough to get Botox twice a year?