hip-hop vs rapping

hip-hop

noun
  • A form of popular and dance music featuring strong percussion and a powerful rhythm, usually accompanied by rapping. 

  • An Afro-American urban youth culture based on rap music, breakdancing etc. 

verb
  • To move by hopping or with a hopping motion. 

  • To perform hip-hop music. 

rapping

noun
  • Musical speech accompanied by a rhythm, most commonly as part of hip-hop music. 

  • The sound of a rap or knock. 

How often have the words hip-hop and rapping occurred in a corpus of books? (source: Google Ngram Viewer )