depravation vs quelling

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. 

quelling

noun
  • The act by which something is quelled. 

adj
  • causing something to quell or be quelled 

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