episcopal vs pontifical

episcopal

adj
  • Of or relating to the affairs of a bishop in various Christian churches. 

pontifical

adj
  • Of or pertaining to a bishop; episcopal. 

  • Pompous, dignified or dogmatic. 

  • Splendid; magnificent. 

  • Of or pertaining to a pope; papal. 

  • Of or relating to the building or forming of bridges. 

  • Of or pertaining to the pontifices of Ancient Rome. 

noun
  • A book containing the offices, or formulas, used by a pontiff. 

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