turbulent vs undisturbed

turbulent

adj
  • violently disturbed or agitated; tempestuous, tumultuous 

  • being in, or causing, disturbance or unrest 

undisturbed

adj
  • not disturbed or agitated 

  • calm 

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