seat belt vs ward

seat belt

noun
  • A restraining belt attached to a vehicle seat and fastened around occupants in order to keep them in place and decelerate them smoothly rather than suddenly in an accident, mitigating the risk of injury from uncontrolled impact with injurious objects. 

ward

noun
  • An object used for guarding. 

  • The ridges on the inside of a lock, or the incisions on a key. 

  • The action of a watchman; monitoring, surveillance (usually in phrases keep ward etc.) 

  • A subdivision of the LDS Church, smaller than and part of a stake, but larger than a branch. 

  • A part of a hospital, with beds, where patients reside. 

  • A section or subdivision of a prison. 

  • An enchantment or spell placed over a designated area or social unit, that prevents any tresspasser from entering; approaching; or even being able to locate said protected premises or demographic. 

  • A guarding or defensive motion or position. 

  • Land tenure through military service. 

  • Guardianship, especially of a child or prisoner. 

  • A warden; a guard; a guardian or watchman. 

  • An area of a castle, corresponding to a circuit of the walls. 

  • An administrative division of a borough, city or council. 

  • A minor looked after by a guardian. 

  • A division of a forest. 

verb
  • To defend, to protect. 

  • To be vigilant; to keep guard. 

  • To fend off, to repel, to turn aside, as anything mischievous that approaches (usually followed by off) 

  • To act on the defensive with a weapon. 

  • To keep in safety, to watch over, to guard. 

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