cryptolect vs localism

cryptolect

noun
  • A secretive language form used by a subculture; an arcane cant. 

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). 

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