brazier vs fan heater

brazier

noun
  • An upright standing or hanging metal bowl used for holding burning coal for a source of light or heat. 

  • A worker in brass. 

fan heater

noun
  • an electric heater fitted with a fan which blows out hot air. 

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