montage vs updation

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. 

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

updation

noun
  • The act or process of updating. 

  • An instance of that process: an update. 

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