occlusion vs sit-down

occlusion

noun
  • Anything that obstructs or closes a vessel or canal. 

  • An occluded front. 

  • The absorption of a gas or liquid by a substance such as a metal. 

  • A closure within the vocal tract that produces an oral stop or nasal stop. 

  • The blocking of the view of part of an image by another. 

  • The alignment of the teeth when upper and lower jaws are brought together. 

  • The process of occluding, or something that occludes. 

sit-down

noun
  • An act of sitting down, especially with other people in some form of social exchange. 

  • A sit-in, a protest of civil disobedience by people sitting and refusing to move. 

adj
  • Intended to be done, used, consumed etc. while sitting. 

How often have the words occlusion and sit-down occurred in a corpus of books? (source: Google Ngram Viewer )