letterbox vs needle

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. 

needle

noun
  • A sensor for playing phonograph records, a phonograph stylus. 

  • A needle-like leaf found on some conifers. 

  • Any slender, pointed object resembling a needle, such as a pointed crystal, a sharp pinnacle of rock, an obelisk, etc. 

  • A strong beam resting on props, used as a temporary support during building repairs. 

  • A text string that is searched for within another string. (see: needle in a haystack) 

  • A fine measurement indicator on a dial or graph. 

  • A long, thin, sharp implement usually for piercing as in sewing, embroidery, acupuncture, tattooing, body piercing, medical injections, sutures, etc; or a blunt but otherwise similar implement used for forming loops or knots in crafts such as darning, knitting, tatting, etc. 

  • The death penalty carried out by lethal injection. 

  • Any of various species of damselfly of the genus Synlestes, endemic to Australia. 

verb
  • To form, or be formed, in the shape of a needle. 

  • To tease in order to provoke; to poke fun at. 

  • To pierce with a needle, especially for sewing or acupuncture. 

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