ready vs vocative

ready

adj
  • Offering itself at once; at hand; opportune; convenient. 

  • Not slow or hesitating; quick in action or perception of any kind. 

  • Prepared for immediate action or use. 

  • Inclined; apt to happen. 

  • Liable at any moment. 

verb
  • To prepare; to make ready for action. 

noun
  • ready money; cash 

vocative

adj
  • 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" 

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

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 ready and vocative occurred in a corpus of books? (source: Google Ngram Viewer )