Abbreviations, anyone?

[nablator]

It is interesting to see some of the Voynich - abbr. in their natural habitat

It's a bit early, 14th century...

Endings that look more like Voynichese "aiiin" were common in the 15th century, sometimes with long sequences of minims.

   
"in annum"

If they had the same function, you would expect to find iiiiin or at least a few iiiin in the Voynich, but there isn't any...