derogative vs vituperative

derogative

adj
  • Of or pertaining to derogation; that derogates 

  • Disparaging; tending or intending to be belittling. 

noun
  • A derogatory word or word-form. 

vituperative

adj
  • Marked by harsh, spoken, or written abuse; abusive, often with ranting or railing. 

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