gnathite vs neb

gnathite

noun
  • Any of the mouth appendages of the Arthropoda. 

neb

noun
  • The nose or snout of an animal, now especially of a fish. 

  • A nib, as of a pen. 

  • A person's nose. 

  • A bird's beak or bill. 

  • The peak of a flat cap. 

  • A projecting extremity; a point or sharp projection. 

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