diaconal vs diocesan

diaconal

adj

  • Of or pertaining to a deacon or the diaconate lay clergy. 

diocesan

adj

  • Pertaining to a diocese. 

noun

  • The bishop of a diocese. 

  • An inhabitant of a diocese. 

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