corroboree vs dance music

corroboree

noun
  • A song or chant made for such a festivity. 

  • A nocturnal dance held by Australian Aborigines, for social, celebratory or warlike purposes. 

  • Any noisy, late-night gathering or disturbance. 

dance music

noun
  • Music composed to accompany social dancing. 

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