collage vs pastiche

collage

noun
  • The technique of producing a work of art of this kind. 

  • A picture made by sticking other pictures onto a surface. 

  • A composite object or collection (abstract or concrete) created by the assemblage of various media; especially for a work of art such as text, film, etc. 

verb
  • To make into a collage. 

pastiche

noun
  • A work of art, drama, literature, music, or architecture that imitates the work of a previous artist. 

  • A musical medley, typically quoting other works. 

  • An incongruous mixture; a hodgepodge. 

  • A postmodern playwriting technique that fuses a variety of styles, genres, and story lines to create a new form. 

verb
  • To create or compose in a mixture of styles. 

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