How often is the appropriate interval for Rejuran treatments?

I am looking into getting Rejuran for the first time, and I am most curious about the treatment cycle.
If you search online, you'll find a wide range of responses, from receiving it every 2 to 3 weeks to once every few months.
It seems that some people receive intensive treatments multiple times at first, and then receive them later for maintenance purposes.
My skin isn't very saggy; my main goal is to relieve dryness and improve skin texture.
So, getting treatments too often is burdensome, and I want to know the appropriate interval.
I am also curious about how long the effects last after just one session.
I'm not sure if it would be better to get it again after the effect has completely worn off.
Or I am wondering if it would be better to get it for maintenance when the effects start to wear off a little.
I would like to know if there is a reason why the recommended frequency varies from hospital to hospital.
For those who have actually received it multiple times, how often do you usually get it?