bebop vs opera

bebop

noun
  • An early form of modern jazz played by small groups and featuring driving rhythms and complex, often dissonant harmonies. 

verb
  • To participate in bebop jazz, such as by dancing in a way associated with the genre. 

  • To walk in an easygoing, carefree manner. 

opera

noun
  • A theatrical work, combining drama, music, song and sometimes dance. 

  • A building designed for the performance of such works; an opera house. 

  • The score for such a work. 

  • Any showy, melodramatic or unrealistic production resembling an opera. 

  • A company dedicated to performing such works. 

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