debase vs sterilize

debase

verb
  • To lower in character, quality, or value; to degrade. 

  • To lower the value of (a currency) by reducing the amount of valuable metal in the coins. 

sterilize

verb
  • To redact (a document), removing classified or sensitive material. 

  • To deprive of the ability to procreate. 

  • To make unable to produce; to make unprofitable. 

  • To kill, deactivate (denature), or destroy (break apart) all living, viable microorganisms and spores on a surface, in a fluid, or contained in a compound, such as culture media or a medical product. 

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