slang vs vernacular

slang

noun
  • Language outside of conventional usage and in the informal register. 

  • A curse word. 

  • The specialized language of a social group, sometimes used to conceal one's meaning from outsiders; cant. 

  • A particular variety of slang; the slang used by a particular group. 

  • An item of slang; a slang word or expression. 

  • Language that is unique to a particular profession or subject; jargon. 

  • Any long, narrow piece of land; a promontory. 

verb
  • To sell (especially illegal drugs). 

vernacular

noun
  • A language lacking standardization or a written form. 

  • Language unique to a particular group of people. 

  • A style of architecture involving local building materials and styles, not imported. 

  • Everyday speech or dialect, including colloquialisms, as opposed to standard, literary, liturgical, or scientific idiom. 

  • Indigenous spoken language, as distinct from a literary or liturgical language such as Ecclesiastical Latin. 

  • The language of a people or a national language. 

adj
  • Of or related to local building materials and styles; not imported. 

  • Connected to a collective memory; not imported. 

  • Of or pertaining to everyday language, as opposed to standard, literary, liturgical, or scientific idiom. 

  • Belonging to the country of one's birth; one's own by birth or nature. 

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