What is the Botox treatment cycle?

My jaw muscles are usually well-developed, so my face shape looks a bit more pronounced, and
I've started noticing even fine expression lines between my eyebrows and around my eyes, so I'm thinking about getting regular Botox treatments.
It is well known that Botox is effective for smoothing wrinkles or reducing muscles, but
I heard that the effect does not last permanently after just one injection, but that you return to your original state over time.
In that case, I would like to know how often Botox treatments are generally recommended to consistently maintain safe and natural-looking results.
I have heard that getting injections too frequently at very short intervals can lead to resistance, so I would like to know the exact frequency of Botox treatments to maintain a satisfactory result while preventing side effects.