liquefaction vs melting

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. 

melting

noun
  • The process of changing the state of a substance from solid to liquid by heating it past its melting point. 

  • The act of softening or mitigating. 

adj
  • Given over to strong emotion; tender; aroused; emotional, tearful. 

  • Which is melting, dissolving or liquefying. 

  • That causes one to melt with emotion; able to make others feel tender and emotional. 

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