derogative vs sneerful

derogative

adj
  • Of or pertaining to derogation; that derogates 

  • Disparaging; tending or intending to be belittling. 

noun
  • A derogatory word or word-form. 

sneerful

adj
  • Expressing contempt. 

  • Given to sneering. 

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