churning vs folding

churning

noun
  • The act by which something is churned. 

  • The quantity of butter prepared (by churning) at one time. 

folding

noun
  • The action of folding; a fold. 

  • the deformation of the Earth's crust in response to slow lateral compression. 

  • Paper money, as opposed to coins. 

  • The keeping of sheep in enclosures on arable land, etc. 

  • Code folding: a source code display technique that can hide the contents of methods, classes, etc. for easier navigation. 

adj
  • Designed to fold; as a folding bed, a folding bicycle, a folding chair, etc. 

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