agglutination vs concurrence

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. 

concurrence

noun
  • Agreement; concurring. 

  • An instance of simultaneous occurrence. 

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