slack vs wrack

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. 

verb
  • To slacken. 

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

adv
  • Slackly. 

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. 

wrack

noun
  • Weeds, vegetation or rubbish floating on a river or pond. 

  • Any marine vegetation cast up on shore, especially seaweed of the family Fucaceae. 

  • The remains; a wreck. 

  • A high flying cloud; a rack. 

verb
  • To execute vengeance; avenge. 

  • To wreck, especially a ship. 

  • To worry; tease; torment. 

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