cruor vs ruby

cruor

noun
  • The colouring matter of the blood. 

  • The clotted portion of coagulated blood, containing the colouring matter; gore. 

ruby

noun
  • A deep red colour. 

  • A ruby hummer, a South American hummingbird, Clytolaema rubricauda. 

  • A red bird-of-paradise, Paradisaea rubra. 

  • A pronunciation guide written above or beside Chinese or Japanese characters. 

  • A clear, deep, red variety of corundum, valued as a precious stone. 

  • The tincture red or gules. 

adj
  • Of a deep red colour. 

verb
  • To make red; to redden. 

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