collage vs descant

collage

verb
  • To make into a collage. 

noun
  • 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. 

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

descant

verb
  • To discuss at length. 

  • To sing or play a descant. 

noun
  • A lengthy discourse on a subject. 

  • A counterpoint melody sung or played above the theme. 

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