high bailiff vs process server

high bailiff

noun
  • An officer of the county courts responsible for executing warrants and court orders. 

process server

noun
  • A deliverer of processes or summonses, the formal announcements of the beginning of a legal action; a huissier de justice or other equivalent position in other legal systems. 

How often have the words high bailiff and process server occurred in a corpus of books? (source: Google Ngram Viewer )