You generally should not rely on counting knob turns. As film builds up on the take-up spool, each turn winds a different amount of film, so the spacing changes through the roll and you can get overlapping or skipped frames.

For 120 film in a Diana-style camera, the proper method is to use the backing-paper markings visible through the red window. Based on the community answers, the “DON’T THINK” text can help only in a very rough way: its 11 characters correspond to the 11 expected 6×6 exposures on a 120 roll. That may let you approximate frame positions, but it is not as dependable as actual frame numbers.

So the practical answer is: use film whose backing paper has readable frame numbers for your camera, rather than trying to advance by turns alone.