mix vs refine

mix

verb
  • To stir together. 

  • To unite with in company; to join; to associate. 

  • To blend by the use of a mixer (machine). 

  • To combine (several tracks). 

  • To combine (items from two or more sources normally kept separate). 

  • To form by mingling; to produce by the stirring together of ingredients; to concoct from different parts. 

  • To produce a finished version of (a recording). 

noun
  • The result of mixing two or more substances; a mixture. 

  • The result of combining items normally kept separate. 

  • The result of mixing several tracks. 

  • The finished version of a recording. 

  • A substance used to dilute or adulterate an illicit drug. 

refine

verb
  • To make nice or subtle. 

  • To improve in accuracy, delicacy, or excellence. 

  • To become pure; to be cleared of impure matter. 

  • To purify of coarseness, vulgarity, inelegance, etc.; to polish. 

  • To purify; reduce to a fine, unmixed, or pure state; to free from impurities. 

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