complaint vs upset

complaint

noun
  • A grievance, problem, difficulty, or concern. 

  • However, court proceedings, such as a trial, cannot be instituted until an indictment or information has been handed down against the defendant. 

  • In a civil action, the first pleading of the plaintiff setting out the facts on which the claim is based; 

  • The purpose is to give notice to the adversary of the nature and basis of the claim asserted. 

  • The act of complaining. 

  • In criminal law, the preliminary charge or accusation made by one person against another to the appropriate court or officer, usually a magistrate. 

  • A bodily disorder or disease; the symptom of such a disorder. 

upset

noun
  • Disturbance or disruption. 

  • An upper set; a subset (X,≤) of a partially ordered set with the property that, if x is in U and x≤y, then y is in U. 

  • The dangerous situation where the flight attitude or airspeed of an aircraft is outside the designed bounds of operation, possibly resulting in loss of control. 

  • An unexpected victory of a competitor or candidate that was not favored to win. 

  • An overturn. 

  • An upset stomach. 

verb
  • To be upset or knocked over. 

  • To shorten (a tire) in the process of resetting, originally by cutting it and hammering on the ends. 

  • To make (a person) angry, distressed, or unhappy. 

  • To tip or overturn (something). 

  • To defeat unexpectedly. 

  • To thicken and shorten, as a heated piece of iron, by hammering on the end. 

  • To disturb, disrupt or adversely alter (something). 

adj
  • Angry, distressed, or unhappy. 

  • Feeling unwell, nauseated, or ready to vomit. 

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