localism vs vernacularity

localism

noun
  • A linguistic feature that is unique to a locality. 

  • The belief that language functions are localized to various parts of the brain. 

  • Attachment to a particular local place; feelings or policies which emphasize local phenomena. 

  • An approach to understanding expressions in terms of position and movement (sometimes abstract, e.g. one who is hungry is in a notional "space" of hunger). 

vernacularity

noun
  • The quality of being vernacular. 

  • A vernacular utterance. 

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