trouble vs upset

trouble

verb
  • To mentally distress; to cause (someone) to be anxious or perplexed. 

  • In weaker sense: to bother or inconvenience. 

  • To worry; to be anxious. 

  • To take pains to do something. 

noun
  • A difficulty, problem, condition, or action contributing to such a situation. 

  • A fault or interruption in a stratum. 

  • A malfunction. 

  • A violent occurrence or event. 

  • Efforts taken or expended, typically beyond the normal required. 

  • Liability to punishment; conflict with authority. 

  • Wife. Clipping of trouble and strife. 

  • A distressing or dangerous situation. 

upset

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

  • 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 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. 

noun
  • 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. 

  • Disturbance or disruption. 

  • An upset stomach. 

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