boil vs churn

boil

verb
  • To be agitated like boiling water; to bubble; to effervesce. 

  • To form, or separate, by boiling or evaporation. 

  • To feel uncomfortably hot. 

  • To be moved or excited with passion; to be hot or fervid. 

  • To bring to a boil, to heat so as to cause the contents to boil. 

  • To begin to turn into a gas, seethe. 

  • To heat to the point where it begins to turn into a gas. 

  • To be uncomfortably hot. 

  • To cook in boiling water. 

noun
  • The point at which fluid begins to change to a vapour; the boiling point. 

  • A dish of boiled food, especially seafood. 

  • A social event at which people gather to boil and eat food, especially seafood. (Compare a bake or clambake.) 

  • The collective noun for a group of hawks. 

  • A localized accumulation of pus in the skin, resulting from infection. 

churn

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

  • 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 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. 

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