letterbox vs shaft

letterbox

noun
  • A rectangular hole or slot. 

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

  • 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. 

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. 

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

shaft

noun
  • The long, narrow, central body of a spear, arrow, or javelin. 

  • A vertical or inclined passage sunk into the earth as part of a mine 

  • A vertical passage housing a lift or elevator; a liftshaft. 

  • A beam or ray of light. 

  • Anything cast or thrown as a spear or javelin. 

  • The main axis of a feather. 

  • Any column or pillar, particularly the body of a column between its capital and pedestal. 

  • The chamber of a blast furnace. 

  • A ventilation or heating conduit; an air duct. 

  • A relatively small area of precipitation that an onlook can discern from the dry surrounding area. 

  • The main cylindrical part of the penis. 

  • Any long thin object, such as the handle of a tool, one of the poles between which an animal is harnessed to a vehicle, the driveshaft of a motorized vehicle with rear-wheel drive, an axle, etc. 

  • The long narrow body of a lacrosse stick. 

verb
  • To fuck over; to cause harm to, especially through deceit or treachery. 

  • To equip with a shaft. 

  • To fuck; to have sexual intercourse with. 

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