cryptolect vs vulgar

cryptolect

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

vulgar

noun
  • The vernacular tongue or common language of a country. 

  • The common people. 

  • A common, ordinary person. 

adj
  • Being a vulgar fraction. 

  • Common, usual; of the typical kind. 

  • Debased, uncouth, distasteful, obscene. 

  • Having to do with ordinary, common people. 

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