After how many sessions did you feel the effects of Botox started to last?

I’ve heard that even if the effects of Botox wear off quickly at first, the duration of the results increases with consistent treatments. For those who have received multiple treatments, I am curious at what session you began to feel the effects were stably maintained. I would also like to know if there was a difference in the duration of the effects or your satisfaction compared to your first treatment. I would like to know if there are differences depending on the area (forehead, chin, glabella, etc.) and how you scheduled your treatments. Please share your experiences or information regarding how long it is important to adhere to the treatment schedule. 🙏