appropriate vs extrinsic

appropriate

adj
  • Suitable or fit; proper. 

  • Suitable to the social situation or to social respect or social discreetness; socially correct; socially discreet; well-mannered; proper. 

verb
  • To take to oneself; to claim or use, especially as by an exclusive right. 

  • To set apart for, or assign to, a particular person or use, especially in exclusion of all others; with to or for. 

  • To annex (for example a benefice, to a spiritual corporation, as its property). 

extrinsic

noun
  • An external factor 

adj
  • external; separable from the thing itself; inessential 

  • not belonging to something; outside 

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