churn vs upset

churn

verb
  • To produce excessive and sometimes undesirable or unproductive activity or motion. 

  • To move rapidly and repetitively with a rocking motion; to tumble, mix or shake. 

  • To continually sign up for new credit cards in order to earn signup bonuses, airline miles, and other benefits. 

  • To agitate rapidly and repetitively, or to stir with a rowing or rocking motion; generally applies to liquids, notably cream. 

  • To stop using a company's product or service. 

  • To repeatedly cancel and rebook a reservation in order to refresh ticket time limits or other fare rule restrictions. 

  • To carry out wash sales in order to make the market appear more active than it really is. 

noun
  • A milk churn. 

  • The mass of people who are ready to switch carriers. 

  • Cyclic activity that achieves nothing. 

  • A vessel used for churning, especially for producing butter. 

  • The time when a consumer switches his/her service provider. 

  • Customer attrition; the phenomenon or rate of customers leaving a company. 

upset

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

  • 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. 

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 churn and upset occurred in a corpus of books? (source: Google Ngram Viewer )