Let there be meaning

[oshfdk]

You should define "roughly".

From your example:
The two k in key.qok are 6 chars apart, why kk2 and not kk3?
The two k in keedy.qok are 8 chars apart, why kk3 and not kk4?

I had no intention to make my example for qokeedy coherent in any deep way. It was only to demonstrate that visually repeating sequence could encode a non-repeating plaintext, nothing more.

I'm talking about physical distances on physical page. For Voynichese with average letter width of 3-4 mm, convenient distances between anchor points could be roughly 8 mm, 16 mm and 24 mm, if we apply the specific cipher I designed to Voynichese. The probability of my design coinciding with the Voynich code parameters is very low.

If there is a way to limit distances to something as low as 3, it would be in itself a very interesting result.

I think I demonstrated just that in my article. You can encode a set of 27 characters with 9 cipher characters and 3 distances. I opted for a 12 character plaintext alphabet in my text only to be able to produce more diverse sequences. On the other hand, Voynichese definitely has more than 9 different glyphs, so 3 distances should be more than enough to encode Latin. Maybe even two distances.