extrinsic vs implicit

extrinsic

adj
  • external; separable from the thing itself; inessential 

  • not belonging to something; outside 

noun
  • An external factor 

implicit

adj
  • Contained in the essential nature of something but not openly shown 

  • Implied indirectly, without being directly expressed 

  • Having no reservations or doubts; unquestioning or unconditional; usually said of faith or trust. 

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