alabaster vs nacreous

alabaster

adj
  • Resembling alabaster: white, pale, translucent. 

  • Made of alabaster. 

noun
  • An off-white colour, like that of alabaster. 

  • A variety of calcite, translucent and sometimes banded. 

  • A fine-grained white or lightly-tinted variety of gypsum, used ornamentally. 

nacreous

adj
  • Exhibiting lustrous or rainbow-like colors. 

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

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