blood clot vs cruor

blood clot

noun
  • A clot formed from platelets and other elements; that forms in a blood vessel in a living organism, and causes thrombosis or obstruction of the vessel at its point of formation or travel to other areas of the body. 

cruor

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

  • The colouring matter of the blood. 

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