atomizer vs evaporator

atomizer

noun
  • An instrument for reducing a liquid to spray or vapor for disinfecting, cooling, medical use or perfume spraying. 

evaporator

noun
  • A piece of equipment used to evaporate the solvent from a solution. 

  • The part of a refrigerator that absorbs heat by evaporating a refrigerant. 

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