grievance vs wormwood

grievance

noun
  • Something which causes grief. 

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

  • Feelings of being wronged; outrage. 

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

  • Violation of regulations or objectionable behavior. 

  • A complaint or annoyance. 

wormwood

noun
  • Something that causes bitterness or affliction; a cause of mortification or vexation. 

  • An intensely bitter herb (Artemisia absinthium and similar plants in genus Artemisia) used in medicine, in the production of absinthe and vermouth, and as a tonic. 

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