articulate vs vocative

articulate

adj
  • Speaking in a clear and effective manner. 

  • Distinctly marked off. 

  • Clear; effective. 

  • Consisting of segments united by joints. 

noun
  • An animal of the subkingdom Articulata. 

verb
  • To bend or hinge something at intervals, or to allow or build something so that it can bend. 

  • To make clear or effective. 

  • To explain; to put into words; to make something specific. 

  • To speak clearly; to enunciate. 

  • to form a joint or connect by joints 

  • to attack a note, as by tonguing, slurring, bowing, etc. 

vocative

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" 

noun
  • The vocative case 

  • A word in the vocative case 

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

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