prelate vs reverend

prelate

noun
  • A clergyman of high rank and authority, having jurisdiction over an area or a group of people; normally a bishop. 

reverend

noun
  • A member of the Christian clergy; a minister. 

adj
  • worthy of reverence or respect 

  • reverent 

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