Engineering your own voynich

[oshfdk]

Frequencies:

1st column:
0.1538 F
0.1325 Ti
0.1197 K
0.1154 m
0.0812 n
0.0684 T

2nd column:
0.1368 a
0.1325 
0.1154 m
0.1026 ai
0.0769 iii
0.0641 ae
0.0598 ei
0.0513 oo

3rd column:
0.1325 yun
0.1239 g
0.0769 an
0.0726 z

If all of prefixes, infixes and suffixes map into the same set (plaintext letters, syllables, ngrams), the top elements should have very similar frequency distributions, I'd expect somewhat more similar than in this split. Maybe this can be used as the optimization criterion when looking for the best split?