bellhop vs commissionaire

bellhop

noun
  • An employee of a hotel who carries a guest's luggage and runs errands. 

verb
  • To work as a bellhop. 

commissionaire

noun
  • One entrusted with a (small) commission, such as an errand; especially, an attendant or subordinate employee in a public office, hotel, etc. 

  • An undisclosed agent under European civil law. 

  • A uniformed doorman. 

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