caddie vs letterbox

caddie

noun
  • A small tray with a handle and compartments for holding items. 

  • A lightweight wheeled cart, often fitted with shelves or racks, or attached to a bicycle as a conveyance for a child, or used to bring home groceries. 

  • A lightweight freestanding rack designed to hold accessories. 

  • A golfer's assistant and adviser. 

  • A tea caddy. 

verb
  • To serve as a golf caddie. 

letterbox

noun
  • A hidden container that holds a logbook and rubber stamp, found by following clues as a form of recreation. 

  • A rectangular hole or slot. 

  • A delivery point for mail, a box, compartment or slot for this purpose. 

  • A collection point for mail intended for onward delivery, a secure box or receptacle for this purpose. 

adj
  • Transferred to home video formats while preserving the original aspect ratio, having black bars above and below the picture area. 

verb
  • To transfer a widescreen motion picture to home video formats while preserving the original aspect ratio, with the placing of black bars above and below the picture area. 

  • To hunt for letterboxes (containers with logbook and rubber stamp) by following clues. 

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