author here: hit me up with questions you've got.
EDIT: The reason I ask is that I assume you don't have the time or desire to add every rapper every person asks you for.
nltk.org/book
It would be very interesting to do something similar for rockers too.
I didn't expect wu-tang to be on the top since it would go across 11 different vocabs. I felt like the law of averages would basically play out.
[Edit] also Notorious B.I.G. :)
About Biggie:"35,000 words covers 3-5 studio albums and EPs. I included mixtapes if the artist was just short of the 35,000 words. Quite a few rappers don’t have enough official material to be included (e.g., Biggie, Kendrick Lamar)"
And to respond to your child comment, I'm sure the same problem (not enough material) applied to Big L.