jawbone vs jawline

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. 

jawline

noun
  • The lower edge of the side of the face (below the cheek), defined by the jawbone. 

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