archpriest vs ruler

archpriest

noun
  • An honorific title applied to a priest who has a specific function. 

  • The highest rank given to a married priest. 

ruler

noun
  • A person who rules or governs; someone or something that exercises dominion or controlling power over others. 

  • A (usually rigid), flat, rectangular measuring or drawing device with graduations in units of measurement; a straightedge with markings. 

verb
  • To beat with a ruler (as a traditional school punishment). 

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