electronic dance music vs waltz

electronic dance music

noun
  • A field of modern popular music, encompassing house, techno and other genres of percussive dance music. 

waltz

noun
  • A piece of music for this dance (or in triple time). 

  • A ballroom dance in 3/4 time. 

  • A simple task. 

verb
  • To dance the waltz (with). 

  • To move briskly and unhesitatingly, especially in an inappropriately casual manner, or when unannounced or uninvited. 

  • To move with fanfare. 

  • To accomplish a task with little effort. 

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