derogative vs derogatory

derogative

adj
  • Of or pertaining to derogation; that derogates 

  • Disparaging; tending or intending to be belittling. 

noun
  • A derogatory word or word-form. 

derogatory

adj
  • Tending to derogate 

  • Disparaging. 

  • Reducing the power or value of (a governmental body, etc); detracting from. 

  • Lessening the worth of (a person, etc); expressing derogation; insulting. 

  • Being or pertaining to a derogatory clause. 

noun
  • A trade-line on a credit report that includes negative credit history. 

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