I bought a bunch of 220 film cheap, and was obsessed with making it work in a Moskva 5 with hand counting.
It's not precise. What happens is, as the film builds up on the takeup spool, the core diameter increases and more length is used per turn of the winder knob.
So if you can figure out where the leader paper ends and the film starts, and how far to wind for the beginning frames, the later ones will just have more space between them. The other hard part is even if you do some math first, increasing your winding by 0.1, 0.15, etc turns is hard to keep track of.
I did a couple rolls this way, had light leaks no matter what I did (on the M5).
I've since started doing this on a Kodak Medallist II I converted to 120/220, but I apparently don't have the bugs out of that yet because I rip the leader paper every 3rd roll or so .
Another headache is remembering how many exposures you have shot and how many MIGHT be left.
Next experiment is in an RB67 120 back...have to see if the counter can be reset halfway through.
I made little tags to estimate how many turns for each incremental exposure, but lost one. I have tags scanned for two formats, and a spreadsheet for my ruminations on how to account for thickness, paper etc.
It's probably easier to just take a look at my camera tags (see the following link) and try it
What I initially did was take the Moskva V 6x6 mask, tape it off for 4.5 cm (not knowing many cameras are skimpy, more like 4.1-4.3 wide), and got 27 6x4.5 exposures from each 220 rool. That gave more freedom than 8 @ 6x9. It got old after a while.
http://www.uptowngallery.org/Murray/220filmin120camera/