dusky vs melanoid

dusky

adj
  • Ashen; having a greyish skin coloration. 

  • Dimly lit, as at dusk (evening). 

  • Having a shade of color that is rather dark. 

noun
  • A dusky dolphin. 

  • A dusky grouse. 

  • A dusky shark. 

melanoid

adj
  • Relating to, or resembling, melanin. 

  • Relating to, or afflicted with, melanosis. 

noun
  • Synonym of melanoidin 

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