roily vs turbulent

roily

adj
  • turbulent 

  • muddy, cloudy (having lots of sediment) 

turbulent

adj
  • violently disturbed or agitated; tempestuous, tumultuous 

  • being in, or causing, disturbance or unrest 

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