defilement vs depravation

defilement

noun
  • The act of defiling. 

  • The state of being defiled. 

  • The protection of the interior walls of a fortification from enfilading fire, as by covering them, or by a high parapet on the exposed side. 

depravation

noun
  • The act of depraving, or making anything bad; the act of corrupting. 

  • Detraction; depreciation. 

  • The state of being depraved or degenerated; degeneracy; depravity. 

  • Change for the worse; deterioration; morbid perversion. 

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