depravation vs perversion

depravation

noun
  • Change for the worse; deterioration; morbid perversion. 

  • Detraction; depreciation. 

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

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

perversion

noun
  • The state of being perverted; depravity; vice. 

  • The action of perverting someone or something; humiliation; debasement. 

  • Distortion or corruption of the original course, meaning, or state of something. 

  • A sexual practice considered abnormal; sexual deviance. 

  • Tendril perversion. 

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