disassociate vs fraternize

disassociate

verb
  • To separate into smaller discrete units, as with analysis. 

  • To separate; to disunite; to disintegrate; to dissolve. 

  • To separate (oneself); to dissolve one's association with a person, group, or situation. 

fraternize

verb
  • To associate as friends with an enemy, in violation of duty. 

  • To associate with others in a brotherly or friendly manner. 

  • To have an intimate or sexual relationship with a forbidden member of the opposite sex; as, in some cases, football players with cheerleaders. 

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