haslet vs viscus

haslet

noun
  • The internal organs of an animal, especially the heart and liver of a pig. 

  • A meatloaf made of these organs. 

viscus

noun
  • One of the organs, as the brain, heart, or stomach, in the great cavities of the body of an animal; especially used in the plural, and applied to the organs contained in the abdomen. 

  • The intestines. 

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