churning vs disturbance

churning

noun
  • The act by which something is churned. 

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

disturbance

noun
  • The act of disturbing, being disturbed. 

  • A noisy commotion that causes a hubbub or interruption. 

  • Something that disturbs. 

  • An interruption of that which is normal or regular. 

  • A serious mental imbalance or illness. 

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