coagulate vs densen

coagulate

verb
  • To become congealed; to convert from a liquid to a semisolid mass. 

  • To cause to congeal. 

noun
  • A mass formed by means of coagulation. 

densen

verb
  • To become dense or more dense. 

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