assertion vs sit-down

assertion

noun
  • A statement or declaration which lacks support or evidence. 

  • A statement in a program asserting a condition expected to be true at a particular point, used in debugging. 

  • The act of asserting; positive declaration or averment. 

  • Maintenance; vindication 

  • Something which is asserted; a declaration; a statement asserted. 

sit-down

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

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

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

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