grievance vs self-flagellation

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. 

self-flagellation

noun
  • Intense feelings of guilt. 

  • The practice of whipping oneself as penance for sins. 

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