How often should I get Botox? I'm wondering if I'm getting it too often.

Lately, I've been concerned about the expression lines between my eyebrows and on my forehead, so I'm considering getting Botox. I've never had it done before, so I'm looking into it, but I'm getting confused because the advice regarding the treatment frequency varies more than I expected. Some places say to get treatments every few months, while others say to get it when the effects start to wear off. I've also heard that getting it too frequently from the start isn't good, so I don't want to rush things. In particular, I don't want the feeling of being completely unable to move my facial expressions; I just want the wrinkles to look naturally less visible. Because of this, I'm wondering if the treatment frequency is determined based on my skin condition and muscle mass. I'd also like to know if the frequency varies depending on the area being treated. For those who have received treatments consistently, I'm curious how often you typically got them done. If there are any specific questions I should ask about the treatment frequency during my initial consultation, please let me know.