[plorg]

I bet you could get something insightful from plotting "unique words" versus "total words" - That might give a good idea of the amount of repetition over time, the length or quantity of output, and the total vocabulary.

[danielsf]

here's what this looks like. ugly as sin as useless for comparing rappers.

http://www.mdaniels.com/vocab/scatter.png

love your other ideas – hopefully can do them later.