airlock vs prefab

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. 

prefab

noun
  • A prefabricated section of a building. 

  • A single-storey prefabricated home built in many British cities immediately after World War II, intended to have a short life, but in a few cases still in use. 

  • A reusable object in a video game world. 

  • A prefabricated building. 

verb
  • To prefabricate. 

adj
  • prefabricated 

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