cock vs letterbox

cock

noun
  • The circle at the end of the rink. 

  • The penis. 

  • The state of being cocked; an upward turn, tilt or angle. 

  • Vulva, vagina. 

  • Shuttlecock. 

  • A male fish, especially a salmon or trout. 

  • A cock pigeon. 

  • The bridge piece that affords a bearing for the pivot of a balance in a clock or watch. 

  • A valve or tap for controlling flow in plumbing. 

  • Hay-cock, a small conical pile of hay. 

  • The crow of a cock, especially the first crow in the morning; cockcrow. 

  • A rooster: a male gallinaceous bird, especially a male domestic chicken (Gallus gallus domesticus). 

  • The style or gnomon of a sundial. 

  • The hammer of a firearm trigger mechanism. 

  • Nonsense; rubbish; a fraud. 

  • A man; a fellow, especially as a term of address. 

  • A vane in the shape of a cock; a weathercock. 

  • The indicator of a balance. 

  • A stupid, obnoxious or contemptible person. 

  • A boastful tilt of one's head or hat. 

verb
  • To turn or twist something upwards or to one side; to lift or tilt (e.g. headwear) boastfully. 

  • To lift the cock of a firearm or crossbow; to prepare (a gun or crossbow) to be fired. 

  • To copulate with; (by extension, as with fuck) to mess up, to damage, to destroy. 

  • To be prepared to be triggered by having the cock lifted. 

  • To erect; to turn up. 

  • To form into piles. 

intj
  • Expression of annoyance. 

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. 

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 cock and letterbox occurred in a corpus of books? (source: Google Ngram Viewer )