descant vs hip-hop

descant

verb
  • To sing or play a descant. 

  • To discuss at length. 

noun
  • A lengthy discourse on a subject. 

  • A counterpoint melody sung or played above the theme. 

hip-hop

verb
  • To perform hip-hop music. 

  • To move by hopping or with a hopping motion. 

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

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

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