churning vs unrest

churning

noun
  • The act by which something is churned. 

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

unrest

noun
  • A state of trouble, confusion and turbulence, especially in a political context; a time of riots, demonstrations and protests. 

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