Aaronic vs rectorial

Aaronic

adj
  • Pertaining to or characteristic of a high priest; priestly. 

  • Of or pertaining to the lower order of priests. 

  • Pertaining to Aaron (elder brother of Moses). 

rectorial

adj
  • Relating to a rector. 

noun
  • The events associated with the appointment of a new rector. 

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