happen vs montage

happen

verb
  • To occur or take place. 

  • To do or occur by chance or unexpectedly. 

  • To encounter by chance. 

montage

verb
  • To combine into, or depict as, a montage. 

noun
  • The art or process of doing this. 

  • A composite work, particularly an artwork, created by assembling or putting together other elements such as pieces of music, pictures, texts, videos, etc. 

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