appreciate vs defame

appreciate

verb
  • To view as valuable. 

  • To be grateful or thankful for. 

  • To increase in value. 

  • To be fully conscious of; understand; be aware of; detect. 

defame

verb
  • To harm or diminish the reputation of; to disparage. 

  • To charge; to accuse (someone) of an offence. 

  • To disgrace; to bring into disrepute. 

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