calm vs turbulent

calm

noun
  • The state of being calm; peacefulness; absence of worry, anger, fear or other strong negative emotion. 

  • A period of time without wind. 

  • The state of being calm; absence of noise and disturbance. 

adj
  • with few or no waves on the surface; not rippled. 

  • Peaceful, quiet, especially free from anger and anxiety. 

  • Free of noise and disturbance. 

  • Without wind or storm. 

verb
  • To become calm. 

  • To make calm. 

turbulent

adj
  • violently disturbed or agitated; tempestuous, tumultuous 

  • being in, or causing, disturbance or unrest 

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