How long does the effect of Xeomin forehead Botox usually last?

I chose Xeomin for my first forehead Botox injection. I have had other Botox injections before, but it was so long ago that I don't really remember exactly how long the effects lasted.

This time, I chose Xeomin considering the price, and about a week after the procedure, the movement of my forehead has definitely decreased and the horizontal wrinkles are much less visible, so I am satisfied so far.

However, you know how Botox maintains its effects well at first but starts to gradually reappear after a few months. Although I know there is a lot of variation from person to person, I am curious to know how long the effects lasted for those who have actually received Xeomin.

I am particularly concerned about getting my forehead treated too often, but I also don't want the wrinkles to deepen again, so I would like to know the appropriate timing.

I am wondering if I need to get vaccinated again after about 3 months, or if there are many people for the effects to last 4 to 6 months. Also, if you have any experience, please let me know if the duration of the effect changes between the first and third doses.