immixture vs liquefaction

immixture

noun
  • The act, or the result of immixing 

liquefaction

noun
  • Process of being, or state of having been, made liquid (from either a solid or a gas) 

  • The liquid or semiliquid that results from this process. 

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