blower vs respirator

blower

noun
  • Any device that blows. 

  • A telephone service providing betting odds and commentary, relayed to customers in a bookmaker's shop via loudspeaker. 

  • The whale; so called by seamen, from its habit of spouting up a column of water. 

  • A small fish of the Atlantic coast, Sphoeroides maculatus; the puffer. 

  • A ducted fan, usually part of a heating, ventilation, and/or air conditioning system. 

  • Telephone. 

  • A person who blows. 

respirator

noun
  • A device designed to allow breathing when it would otherwise be hindered, as by a medical condition or the presence of poisonous vapors. 

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