degrade vs pervert

degrade

verb
  • To lower in value or social position. 

  • To reduce in altitude or magnitude, as hills and mountains; to wear down. 

  • To reduce in quality or purity. 

pervert

verb
  • To become perverted; to take the wrong course. 

  • To turn another way; to divert. 

  • To corrupt; to cause to be untrue; corrupted or otherwise impure 

  • to misinterpret designedly. 

  • To misapply, misuse, use for a nefarious purpose 

noun
  • A person whose sexual habits are not considered acceptable. 

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