aquamarine vs glaucous

aquamarine

adj
  • Of a bluish-green colour. 

noun
  • A bluish-green variety of beryl. 

  • The bluish-green colour of the sea. 

glaucous

adj
  • Of a pale grey or bluish-green, especially when covered with a powdery residue. 

  • Covered with a bloom or a pale powdery covering, regardless of colour. 

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