gnathite vs jawbone

gnathite

noun
  • Any of the mouth appendages of the Arthropoda. 

jawbone

noun
  • Any of the bones in the lower or upper jaw. 

  • The bone of the lower jaw; the mandible. 

  • A shaken musical instrument (an idiophone) made from the jawbone of an animal and shaken such that the teeth vibrate in their sockets to produce sound. 

verb
  • To talk persistently in an attempt to persuade somebody to cooperate. 

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