agglomeration vs montage

agglomeration

noun
  • The act or process of collecting in a mass; a heaping together. 

  • State of being collected in a mass; a mass; cluster. 

  • An extended city area comprising the built-up area of a central city and any suburbs linked by continuous urban area. 

  • a mass of large volcanic fragments bonded under heat. 

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. 

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