derisive vs scathing

derisive

adj
  • Deserving or provoking derision or ridicule. 

  • Expressing or characterized by derision; mocking; ridiculing. 

noun
  • A derisive remark. 

scathing

adj
  • Harshly or bitterly critical; vitriolic. 

  • Harmful or painful; acerbic. 

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