approval vs defiance

approval

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

  • 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. 

defiance

noun
  • The feeling, or spirit of being defiant. 

  • A challenging attitude or behaviour; challenge. 

  • Open or bold resistance to or disregard for authority, opposition, or power. 

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