mountebank vs vocative

mountebank

noun
  • One who sells by deception; a con artist. 

  • One who sells dubious medicines. 

  • Any boastful, false pretender. 

verb
  • To act as a mountebank. 

  • To cheat by boasting and false pretenses. 

vocative

noun
  • A word in the vocative case 

  • The vocative case 

  • Something said to (or as though to) a particular person or thing; an entreaty, an invocation. 

adj
  • Of or pertaining to calling; used in calling or vocation. 

  • Used in address; appellative (said of that case or form of the noun, pronoun, or adjective, in which a person or thing is addressed). For example "Domine, O Lord" 

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