approval vs detraction

approval

noun
  • Something mailed by a seller to a collector to match their stated interests; the collector can approve of or return the item. 

  • An expression granting permission; an indication of agreement with a proposal; an acknowledgement that a person, thing, or event meets requirements. 

  • An expression of favorable acceptance and encouragement; a compliment that also condones. 

detraction

noun
  • The act of detracting something, or something detracted; taking away; diminution. 

  • A derogatory or malicious statement; a disparagement, misrepresentation or slander. 

  • The act of revealing previously unknown faults of another person to a third person. 

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