choreography vs opera

choreography

noun
  • The art of creating, arranging and recording the dance movements of a work, such as a ballet. 

  • The art of creating and arranging sequences of movement for performances of any kind, such as in fight choreography. 

  • The dance steps, sequences or styles peculiar to a work, group, performance or institution. 

  • The representation of these movements by a series of symbols. 

  • The notation used to construct this record. 

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 choreography and opera occurred in a corpus of books? (source: Google Ngram Viewer )