rap music vs spank

rap music

noun
  • Hip-hop music, especially when focused on rapping. 

spank

noun
  • A slapping sound, as produced by spanking. 

  • An instance of spanking, separately or part of a multiple blows-beating; a smack, swat, or slap. 

verb
  • To move rapidly. 

  • To beat, smack or slap a person's buttocks, with the bare hand or other object, as punishment, gesture, or form of sexual interaction. 

  • To hit very hard. 

  • To soundly defeat, to trounce. 

How often have the words rap music and spank occurred in a corpus of books? (source: Google Ngram Viewer )