derisive vs ironical

derisive

adj
  • Expressing or characterized by derision; mocking; ridiculing. 

  • Deserving or provoking derision or ridicule. 

noun
  • A derisive remark. 

ironical

adj
  • Characterized by or constituting (any kind of) irony. 

  • Given to the use of irony; sarcastic. 

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