grievance vs repression

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. 

repression

noun
  • The involuntary rejection from consciousness of painful or disagreeable ideas, memories, feelings, or impulses. 

  • The act of repressing; state of being repressed. 

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