grievance vs grumble

grievance

noun
  • A complaint or annoyance. 

  • 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. 

  • Something which causes grief. 

grumble

noun
  • A surly complaint. 

  • A low thundering, rumbling or growling sound. 

  • The sound made by a hungry stomach. 

verb
  • To utter in a grumbling fashion. 

  • To complain; to murmur or mutter with discontent; to make ill-natured complaints in a low voice and a surly manner. 

  • To make a low, growling or rumbling noise, like a hungry stomach or certain animals. 

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