heating vs melting

heating

noun
  • The act of making something hot. 

  • A system that raises the temperature of a room or building. Compare heater. 

adj
  • Causing heat. 

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 heating and melting occurred in a corpus of books? (source: Google Ngram Viewer )