musical vs prolog

musical

noun
  • A stage performance, show or film that involves singing, dancing and musical numbers performed by the cast as well as acting. 

  • A meeting or a party for a musical entertainment; a musicale. 

adj
  • Pleasing to the ear; sounding agreeably; having the qualities of music; melodious; harmonious. 

  • Fond of music; discriminating with regard to music; gifted or skilled in music. 

  • Of, belonging or relating to music, or to its performance or notation. 

  • Pertaining to a class of games in which players move while music plays, but have to take a fixed position when it stops; by extension, any situation where people repeatedly change positions. 

prolog

noun
  • A speech or section used as an introduction, especially to a play or novel. 

  • A component of a computer program that prepares the computer to execute a routine. 

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