despicable vs diabolic

despicable

adj

  • Fit or deserving to be despised; contemptible; mean. 

noun

  • A wretched or wicked person. 

diabolic

adj

  • Extremely evil or cruel. 

  • Showing wickedness typical of a devil. 

  • diabolic magic square 

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