About word length distribution

[oshfdk]

Assuming I did not do any major mistake it could indicate that word lengths was decided by the dice or similar method.

It just indicates that the word lengths still closely follow a binomial distribution. I don't think it gives any specific hints about the underlying method, be it 9 coin tosses, 3 dice, three wheels, roman numerals nomenclator, or many other methods largely compatible with this distribution that have been suggested in the past 20+ years.