I've had fillers injected into my frown lines, and I'm curious about the treatment cycle :)

I was really bothered by the wrinkles between my eyebrows, so I consulted about fillers and had the procedure done a while ago :)
I don't usually tend to frown much, but at some point, I noticed lines remaining between my eyebrows. Even with makeup, that area wasn't covered well, and it even made me look tired, so I eventually decided to get fillers.

At first, I was a little nervous about the procedure itself, but it didn't take as long as I expected, and the results weren't bad. The area between my eyebrows looked slightly softer, so I was satisfied when looking in the mirror for a while. However, as time passed, the lines started to look the way they used to, so I became curious about how often I should schedule the filler treatments. :)

I've heard that the duration of fillers varies depending on the area. How long does it usually last for the glabella area? Getting them too frequently is a burden, but I'm also not sure if it's right to wait until the filler completely disappears or the wrinkles deepen again. If anyone has received fillers for the glabella area, I'd like to know how often you went for follow-up consultations. Please let me know what interval was suitable for maintaining a natural look. :)