approval vs repulsion

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. 

repulsion

noun
  • An extreme dislike of something, or hostility to something. 

  • The repulsive force acting between bodies of the same electric charge or magnetic polarity. 

  • The act of repelling or the condition of being repelled. 

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