We can assume that at a given point in the VMS text there are probably numbers.
When we author tells about the number of leafs, flowers, or amount of berries. The number of woman there are in the zodiac sign, or number of days in a month. How many zodiacs there are and perhaps somewhere a reference to a year. That is very common.
Also perhaps there are references in the text to other works, like to the work of Dioscorides.
When there really are recipes inside the VMS, as a reader I need to know the ratio in which I have to use the root in kilo’s, and do I need 10 berries and 3 cups of flowers per person or more?
Allright it is possible that a year in the text like for example 1382 is written in full, but not very usual. Yes small numbers are eary do-able like:
A weight of three oboloi of hare’s rennet taken with wine is suitable for those bitten by wild animals, for dysenterics, for women who suffer from discharges, for blood clots, and for coughing up blood from the chest; applied to the cervix with butter after menstruation, it aids conception, but if drunk after menstruation, it causes barrenees… (Dioscorides, De materia medica 2.75. Translation: L. Beck) Taken from here
“nobody has so far been able to actually match the Voynich words to any number system” from http://www.voynich.nu/a3_para.html
From the old 1968 paper from Tiltman (BY BRIGADIER JOHN H. TILTMAN) i quote
Peter Long has suggested to me that the A groups might represent Roman numerals. Thus AIIL might be IlJ, and AR AR AE XXV, but this, iftrue, would only present one with a set of numbered categories which doesn’t solve the problem. In any case, though it accounts for the properties of the commoner combinations, it produces many impossible ones.