airlock vs wicket

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. 

wicket

noun
  • A small door or gate, especially one beside a larger one. 

  • An angle bracket when used in HTML. 

  • Any of the small arches through which the balls are driven. 

  • A temporary metal attachment that one attaches one's lift-ticket to. 

  • A small window or other opening, sometimes fitted with a grating. 

  • A device to measure the height of animals, usually dogs. 

  • A service window, as in a bank or train station, where a customer conducts transactions with a teller 

  • A dismissal; the act of a batsman getting out. 

  • The pitch. 

  • a ticket barrier at a rail station, box office at a cinema, etc. 

  • One of the two wooden structures at each end of the pitch, consisting of three vertical stumps and two bails; the target for the bowler, defended by the batsman. 

  • The area around the stumps where the batsmen stand. 

  • A shelter made from tree boughs, used by lumbermen. 

  • The period during which two batsmen bat together. 

  • The space between the pillars, in post-and-stall working. 

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