blood clot vs thromboid

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. 

thromboid

noun
  • Synonym of thrombus 

adj
  • Resembling a thrombus 

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