brazier vs heat sink

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. 

heat sink

noun
  • A material capable of absorbing heat. 

  • An object, system or environment that absorbs and dissipates heat from objects in thermal contact (either direct or radiant) with it. 

  • A place toward which the heat moves in a system. 

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