How often should I schedule Pico Toning treatments?

I thought I had been applying sunscreen quite diligently, but recently I've noticed faint freckles and blemishes suddenly popping up on my face. Every time I look in the mirror without makeup, my skin tone looks so dull overall that it makes me dread looking in the mirror...

I've heard that Pico Toning is the cleanest treatment for improving skin tone and reducing blemishes, so I'm looking for a nearby dermatology clinic. I've heard that Pico Toning isn't a one-time thing; you need multiple sessions to see results. How often do people usually go for treatments?

I would appreciate advice from anyone who knows the recommended treatment interval: will blemishes definitely fade significantly if I receive Pico Toning consistently every week or two?