breather vs ventilator

breather

noun
  • A heavy breather. 

  • A short break; a rest or respite. 

  • A spatially localized, time-periodic excitation in a one-dimensional lattice. 

  • An air inlet path to the crankcase 

  • Something or someone that breathes. 

ventilator

noun
  • A machine that moves breathable air into and out of the lungs of a patient who is unable to breathe sufficiently. 

  • A device that circulates fresh air and expels stale or noxious air. 

  • Some behaviour or happening that relieves a tense atmosphere or situation. 

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