letterbox vs roller

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. 

roller

noun
  • A rolling pin 

  • A long wide bandage used in surgery. 

  • One of a set of small cylindrical tubes used to curl hair. 

  • Any rotating cylindrical device that is part of a machine, especially one used to apply or reduce pressure. 

  • A cylindrical (or approximately cylindrical) item used under a heavy object to facilitate moving it; usually several are needed. 

  • A large, wide, curling wave that falls back on itself as it breaks on a coast. 

  • A person who rolls something, such as cigars or molten metal. 

  • A police patrol car or patrolman (rather than an unmarked police car or a detective) 

  • A roll of titles or (especially) credits played over film or video; television or film credits. 

  • A roller towel. 

  • A cylindrical tool for applying paint or ink. 

  • A breed or variety of roller pigeon that rolls (i.e. tumbles or somersaults) backwards (compare Penson roller, Birmingham roller, tumbler). 

  • A large rolling device used to flatten the surface of the pitch. 

  • A padded surcingle that is used on horses for training and vaulting. 

  • The cylinder snakes, small ground snakes of the genus Cylindrophis. 

  • A small wheel, as of a caster, a roller skate, etc. 

  • An agricultural machine used for flattening land and breaking up lumps of earth. 

  • One of a set of rolling cylinders allowing a rider to practise balance while training indoors. 

  • Any insect whose larva rolls up leaves, especially those in family Tortricidae. 

  • A dung beetle that rolls dung into balls. 

  • A throw which involves the player throwing the disc in a way that makes it roll, by that being able to travel further than if thrown in the air. Only used on holes with open areas with short or no grass. 

  • Any of various aggressive birds, of the family Coraciidae, having bright blue wings and hooked beaks. 

  • A wheelchair user. 

verb
  • To roller skate. 

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