churn vs spring something on

churn

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. 

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. 

spring something on

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