brunet vs stygian

brunet

adj
  • Of a man or boy, having brown or black hair. 

  • Of a man's or boy's hair: brown or black. 

noun
  • A man or boy with brown or black hair. 

stygian

adj
  • Dark and gloomy. 

  • Having a luminosity below 0%. 

  • Infernal or hellish. 

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