grievance vs sit-down

grievance

noun
  • Feelings of being wronged; outrage. 

  • A formal complaint, especially in the context of a unionized workplace. 

  • A wrong or hardship suffered, which is the grounds of a complaint. 

  • Violation of regulations or objectionable behavior. 

  • A complaint or annoyance. 

  • Something which causes grief. 

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 grievance and sit-down occurred in a corpus of books? (source: Google Ngram Viewer )