Winding clicks for Holga with frame removed?

Hey folks -

I just got my first Holga. I took out the picture frame from the body of the
camera. The first two rolls of film I 'ruined' (If you can use that term
with this camera) by advancing the film according to the numbers on the
back. The pictures overlapped with one another. The next roll of film, I
counted the clicks between each numbered frame and came up with 18. I
advanced each photo two frames, and got no overlap.

Has anyone calculated how many clicks I can advance each frame so I can pack
my photos more tightly yet avoid overlap?

Please, no Holga flames. I've already gotten one photo that I'm happy with
from it, and out of three rolls of film, that beats my average with my
decent 35 mm camera.

Steve Lefevre