How long does the filler last?

Hello. I’ve always been very interested in improving skin elasticity and volume. This is because my skin is quite thin, and as a result, it loses elasticity as the days go by. Because of this, I am very interested in fillers! However, I am concerned about the duration of the effects, so I am writing this post to ask for advice. There is a common perception that fillers don't last long because they need to be injected periodically, right? But when I look at people who have actually gotten them, it doesn't seem to be the case. So, I am curious to know how long the effects lasted for those of you who have actually received fillers, especially for the glabella area. I am particularly worried about the duration of the fillers because my skin is so thin.