hip-hop vs roundhouse

hip-hop

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

  • To perform hip-hop music. 

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. 

roundhouse

verb
  • To punch or kick with an exaggerated sweeping movement. 

noun
  • A circular prison, especially a small local lockup or station house. 

  • A prehistoric dwelling typical of northwest Europe in the Iron Age and Bronze Age. 

  • A circular building in which locomotives are housed. 

  • The uppermost room or cabin of any note upon the stern of a ship. 

  • A privy near the bow of a vessel, especially as reserved for officers. 

  • A punch or kick delivered with an exaggerated sweeping movement. 

  • In the game of pinochle, a meld consisting of a queen and king in each of the four suits. 

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