Does Botox for frown lines work immediately?

My frown lines are a bit severe.

Since the space between the eyebrows is located in the center of the face, it seems to have a significant impact on first impressions.

Does Botox help a lot with frown lines?

If I'm going to get it, I should get it consistently... but I haven't tried it yet, so I'm a bit worried.

If it works well, I'd like to try it.