headboard vs sandbox

headboard

noun
  • A board on the front of a train, carrying the train's name or that of the service it is on. 

  • A panel, usually of metal, attached to the head of a fore-and-aft sail for additional strength. 

  • A grave marker made of wood. 

  • A vertical panel, either plain or upholstered, attached to the head of a bed. 

sandbox

noun
  • A box carried on locomotives, from which sand runs onto the rails in front of the driving wheels, to prevent slipping. 

  • An animal's litter box. 

  • A container for sand or pounce, used historically before blotting paper. 

  • The Middle East. 

  • A children's play area consisting of a box filled with sand. 

  • A page on a wiki where users are free to experiment without destroying or damaging any legitimate content. 

  • An isolated area where a program can be executed with a restricted portion of the resources available. 

  • A box filled with sand that is shaped to form a mould for metal casting. 

verb
  • To restrict (a program, etc.) by placing it in a sandbox. 

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