How many weeks should one wait, between sessions for laser hair removal of the face with Soprano Laser?

I am a female, and I'm Indian with a fair to wheatish complexion. I have always had alot of dark facial hair. I have had my first laser hair removal treatment with the Soprano Laser for my facial hair. It's been 10 weeks. My clinic asked me to wait for the full hair growth and then have the next session. By the looks of it, my hair growth is at about 70%. So, I wanted to know, how does it work and how long should I wait? Because whatever I have read online says about 6-8 weeks between sessions.