heating vs soldering

heating

noun
  • The act of making something hot. 

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

adj
  • Causing heat. 

soldering

noun
  • An instance of soldering. 

  • A soldered joint. 

  • A method of joining two metallic surfaces by melting an alloy between them. 

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