burgomaster vs huissier de justice

burgomaster

noun
  • The mayor, or head magistrate, of a town in the Netherlands, Belgium, Germany and certain other countries. 

huissier de justice

noun
  • An officer of the court in several European countries who serves processes and notices, seizes and auctions off property, and executes garnishments, levies, and evictions, roughly similar to British bailiffs or private constables in Massachusetts and Rhode Island. 

How often have the words burgomaster and huissier de justice occurred in a corpus of books? (source: Google Ngram Viewer )