agglutination vs coming together

agglutination

noun
  • The act of uniting by glue or other tenacious substance; the state of being thus united; adhesion of parts. 

  • Combination in which root words are united with little or no change of form or loss of meaning. See agglutinative. 

  • The clumping together of red blood cells or bacteria, usually in response to a particular antibody. 

coming together

noun
  • A union. 

  • A collision. 

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