discern vs pervert

discern

verb
  • To perceive, recognize, or comprehend with the mind; to descry. 

  • To distinguish something as being different from something else; to differentiate. 

  • To detect with the senses, especially with the eyes. 

  • To perceive differences. 

pervert

verb
  • to misinterpret designedly. 

  • To turn another way; to divert. 

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

  • To misapply, misuse, use for a nefarious purpose 

  • To become perverted; to take the wrong course. 

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

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