breach vs pledge

breach

noun
  • The act of breaking, in a figurative sense. 

  • A breaking or infraction of a law, or of any obligation or tie; violation; non-fulfillment 

  • A difference in opinions, social class etc. 

  • A breaking of waters, as over a vessel or a coastal defence; the waters themselves 

  • A breaking up of amicable relations, a falling-out. 

  • A breaking out upon; an assault. 

  • A gap or opening made by breaking or battering, as in a wall, fortification or levee / embankment; the space between the parts of a solid body rent by violence 

verb
  • To break into a ship or into a coastal defence. 

  • To make a breach in. 

  • To leap out of the water. 

  • To violate or break. 

  • To charge or convict (someone) of breaching the terms of a bail, probation, recognizance, etc. 

pledge

noun
  • A solemn promise to do something. 

  • The personal property so pledged, to be kept until the debt is paid. 

  • A bailment of personal property to secure payment of a debt without transfer of title. 

  • A person who has taken a pledge of allegiance to a college fraternity, but is not yet formally approved. 

  • A drinking toast. 

  • An asset or person temporarily handed over to guarantee the fulfilment of something promised, under threat of permanent loss of the thing handed over; surety, security, hostage. 

  • A promise to abstain from drinking alcohol. 

verb
  • To deposit something as a security; to pawn. 

  • To make a solemn promise (to do something). 

  • To give assurance of friendship by the act of drinking; to drink to one's health. 

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