I don’t know the answer to this question … but I can tell you who might:
… Animators.
Go to Home > Entertainment & Music > Comics & Animation
and ask this question, and they might be able to help you.
In the early parts of making an animated movie or a game, the first thing that happens is that the character designers (sometimes called ‘modelers’, or ‘character TDs’, or ‘character riggers’) have to define all the ranges of motion for the characters, including human characters. They then turn this over to the lead animators, who define a number of pre-defined poses.
Included among those poses are series of facial poses. The “phoneme” dictionary is the list of positions the character’s mouth will form when it is speaking (this is the “ee” pose, this is the “oo” pose). And this is coupled with the other muscles in the face that define the expressions (the eyebrows do this when surprised, this when angry, this when confused).
You can quickly see that the list of poses becomes *enormous*. There may be 35 different “phonemes” with 22 different expressions (so a surprised-”ee” is a different pose than a confused-”ee” which is different from a *really* confused-”ee”) so this can multiply pretty quickly … especially when you multiply all the different body poses (running, sitting, raising a sword … raising a sword while running in surprise and shouting “eeeek”). Etc.
Game animators may actually be able to tell you how many predefined body poses there are in a character’s repertoire. And film animators may be able to talk about facial poses, phonemes, and expressions.
So that might give you an idea.