defame vs slander

defame

verb
  • To disgrace; to bring into disrepute. 

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

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

slander

verb
  • To utter a slanderous statement about; baselessly speak ill of. 

  • To poke fun at a certain group of people 

noun
  • A collection of humorous videos intended to poke fun at a certain group of people, such as a community or nation 

  • A false or unsupported, malicious statement (spoken, not written), especially one which is injurious to a person's reputation; the making of such a statement. 

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