How often should Pico Toning treatments be spaced out?

Hello. Lately, my face has felt dull overall with visible pigmentation in certain areas, so I am looking into dermatological procedures. While researching various options, I learned about Pico Toning, and I am writing to inquire about the typical intervals at which clinics perform these treatments. I am wondering if Pico Toning is a procedure that requires repeated sessions at regular intervals, rather than expecting immediate, noticeable changes after just one session. I would also like to know if the number of sessions or the intervals are determined differently based on skin condition for first-time patients. I am also curious if I can expect changes in skin texture, in addition to tone and pigmentation, while receiving Pico Toning. Although individual results may vary, I would appreciate it if you could tell me what aspects are generally assessed during a consultation to establish a treatment plan.