How often should I get a density checkup?

I am thinking of trying Dencerty for the first time, and I am most curious about the treatment cycle.
When I searched the internet, I found that the stories varied so much, ranging from 3 months to 1 year.
Some people say they receive it again after about 6 months.
Also, some people say they only get it about once a year because the effects last a long time. Is there a big difference from person to person?
My skin isn't severely sagging; it's just that it has lost a little elasticity.
So, getting the procedure too often actually feels like a burden.
I am also curious about how long the effects lasted after the first procedure.
I'm also wondering if it's better to get it again after the effects have completely worn off.
Or are there many people who receive it for maintenance purposes when the effects start to wear off a little?
I am curious to know how often those who have received Density treatments multiple times usually get them.
I would appreciate it if you could also let me know the appropriate treatment interval for first-time patients.