Can Botox be effective for removing deep frown lines?

I developed wrinkles between my eyebrows because I habitually frown or grimace when I get angry. As I get older, these wrinkles seem to be getting deeper, and it keeps bothering me. Would Botox be effective for deep wrinkles? I suspect it would be difficult to see results with just one or two sessions for deep wrinkles, so I am also curious how often I need to get this treatment. Please let me know if you have had this procedure.