jawbone vs mentum

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. 

mentum

noun
  • The chin. 

  • The central part of the labium in insects. 

  • A chin-like projection below the mouth of certain mollusks. 

  • A projection in front of the flower in some orchids. 

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