denature vs depreciate

denature

verb
  • To take away a natural characteristic or inherent property of (a thing or a person). 

  • To combine fissile material with nonfissile material in order to prevent its use in an atomic weapon. 

  • To alter its original form or state, especially of a protein, by heat, acidity etc. 

  • To add something to (alcohol) that makes it unsuitable for consumption but leaves it suitable for most other purposes. 

depreciate

verb
  • To belittle or disparage. 

  • To lessen in price or estimated value; to lower the worth of. 

  • To decline in value over time. 

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