debasement vs vitiation

debasement

noun
  • The act of debasing or the state of being debased; a lowering or degradation, especially in character or quality. 

  • The lowering of the value of a currency by reducing the amount of valuable metal in the coins. 

vitiation

noun
  • a reduction in the value, or an impairment in the quality of something 

  • moral corruption 

  • an abolition or abrogation 

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