arrogant vs dictatorial

arrogant

adj
  • Having excessive pride in oneself, often with contempt or disrespect for others. 

dictatorial

adj
  • in the manner of a dictator, usually with callous disregard for others. 

  • of or pertaining to a dictator 

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