sh_ and ch_ compose the same words

[MarcoP]

The plot I get for chedy / shedy seems to me reasonably close (though not identical) to the one computed by Rene on the basis of Nablator's spreadsheet. I have included {0,0} pages. The red line is y=x.

I think that nablator's spreadsheet was based on the Takeshi Takahashi transcription. If you used another one, the difference would be explained.

I am sorry, I forgot to mention that I used Takahashi's transcription. There must be some other reason for the differences.