breach vs slack

breach

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

  • 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 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. 

slack

noun
  • A tidal marsh or shallow that periodically fills and drains. 

  • Unconditional listening attention given by client to patient. 

  • A temporary speed restriction where track maintenance or engineering work is being carried out at a particular place. 

  • The part of anything that hangs loose, having no strain upon it. 

  • Small coal; coal dust. 

  • A valley, or small, shallow dell. 

adv
  • Slackly. 

verb
  • To slacken. 

  • To lose cohesion or solidity by a chemical combination with water; to slake. 

adj
  • Moderately warm. 

  • Vulgar; sexually explicit, especially in dancehall music. 

  • Not active or busy, successful, or violent. 

  • Excess; surplus to requirements. 

  • Lax; not tense; not firmly extended. 

  • Lacking diligence or care; not earnest or eager. 

  • Lax. 

  • Moderate in speed. 

  • Weak; not holding fast. 

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