nocent vs sullen

nocent

adj
  • Causing injury; harmful. 

sullen

adj
  • Having a brooding ill temper; sulky. 

  • Gloomy; dismal; foreboding. 

  • Sluggish; slow. 

noun
  • Sullen feelings or manners; sulks; moroseness. 

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