strident vs vocative

strident

adj
  • Grating or obnoxious 

  • Loud; shrill, piercing, high-pitched; rough-sounding 

  • Vigorous; making strides 

noun
  • One of a class of s-like fricatives produced by an airstream directed at the upper teeth. 

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