I'm searching a word that could replace the phrase "number of classes".
In detail, I'm writing a paper in which I'm speaking about a classification method, and the number of classes is one of its parameters. I would like to use a one-word term as a name for this parameter.
I thought about "granularity" but unfortunately, this term is used to represent another well-known concept in the same domain I'm working on. So, I would avoid it. Coarseness and graininess, although known to be synonyms of granularity, they do not have the exact meaning I'm searching for, which is the degree of division in a classification.