apocryphal vs lethetic

apocryphal

adj
  • Of doubtful authenticity, or lacking authority; not regarded as canonical. 

  • Of dubious veracity; of questionable accuracy or truthfulness; anecdotal or in the nature of an urban legend. 

  • Of, or pertaining to, the Apocrypha. 

lethetic

adj
  • Failing to mirror reality, purely escapist or nonsensical. 

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