door vs ventilator

door

noun
  • An entry point. 

  • A barrier. 

  • A means of approach or access. 

  • A portal of entry into a building, room, or vehicle, typically consisting of a rigid plane movable on a hinge. Doors are frequently made of wood or metal. May have a handle to help open and close, a latch to hold the door closed, and a lock that ensures the door cannot be opened without the key. 

  • Any flap, etc. that opens like a door. 

  • A possibility. 

  • The proceeds from entrance fees and/or ticket sales at a venue such as a bar or nightclub, especially in relation to portion paid to the entertainers. "The bar owner gives each band a percentage of the door and charges customers more to get in" 

verb
  • To cause a collision by opening the door of a vehicle in front of an oncoming cyclist or pedestrian. 

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 door and ventilator occurred in a corpus of books? (source: Google Ngram Viewer )