compilation vs photomontage

compilation

noun
  • The act or process of compiling or gathering together from various sources. 

  • Translation of source code into object code by a compiler. 

  • That which is compiled; especially, a book or document composed of materials gathering from other books or documents. 

photomontage

noun
  • The art of constructing such images. 

  • A composite image combining two or more photographs. 

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