bellhop vs redcap

bellhop

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

verb
  • To work as a bellhop. 

redcap

noun
  • A porter in a US railway station. 

  • A member of the Royal Military Police a unit in the British army. 

  • A breed of poultry. 

  • A type of evil goblin or imp. 

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