derive vs disappear

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. 

disappear

verb
  • To go missing; to become a missing person. 

  • To make vanish; especially, to abduct and murder surreptitiously for political reasons. 

  • To go away; to become lost. 

  • To vanish. 

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