derive vs obtain

derive

verb
  • To obtain or receive (something) from something else. 

  • To deduce (a conclusion) by reasoning. 

  • To originate or stem (from). 

  • To create (a compound) from another by means of a reaction. 

  • To find the derivation of (a word or phrase). 

  • To turn the course of (water, etc.); to divert and distribute into subordinate channels. 

obtain

verb
  • To get hold of; to gain possession of, to procure; to acquire, in any way. 

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