chalky vs nacreous

chalky

adj
  • Resembling chalk in some way. 

  • Of a tournament: in which the favorites win, or expected to win, most of the games. 

  • Consisting of or containing chalk. 

nacreous

adj
  • Of, or resembling nacre (mother of pearl). 

  • Exhibiting lustrous or rainbow-like colors. 

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