airlock vs scuttle

airlock

noun
  • A vestibule, foyer or entranceway with doors to the exterior on one end and doors to the interior on the other, functioning to keep indoor and outdoor air, humidity, and air temperatures separate. 

  • A sealed, airtight chamber, such as in a manned spacecraft or submarine, used to provide access to and from the sealed area without allowing air out or water in. 

scuttle

noun
  • A hatch that provides access to the roof from the interior of a building. 

  • A small hatch or opening in a boat. Also, small opening in a boat or ship for draining water from open deck. 

  • A broad, shallow basket. 

  • A container like an open bucket (usually to hold and carry coal). 

  • A quick pace; a short run. 

verb
  • To deliberately sink one's ship or boat by any means, usually by order of the vessel's commander or owner. 

  • To cut a hole or holes through the bottom, deck, or sides of (as of a ship), for any purpose. 

  • To deliberately wreck one's vehicle (of any sort). 

  • To undermine or thwart oneself or one's position or property, especially deliberately. 

  • To move hastily, to scurry. 

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