fret vs slack

fret

noun
  • A channel or passage created by the sea. 

  • Agitation of the surface of a fluid by fermentation or some other cause; a rippling on the surface of water. 

  • An ornamental pattern consisting of repeated vertical and horizontal lines, often in relief. 

  • A fog or mist at sea, or coming inland from the sea. 

  • The worn sides of riverbanks, where ores or stones containing them accumulate after being washed down from higher ground, which thus indicate to miners the locality of veins of ore. 

  • One of the pieces of metal, plastic or wood across the neck of a guitar or other string instrument that marks where a finger should be positioned to depress a string as it is played. 

  • Agitation of the mind marked by complaint and impatience; disturbance of temper; irritation. 

  • Herpes; tetter (“any of various pustular skin conditions”). 

  • A saltire interlaced with a mascle. 

  • A channel, a strait; a fretum. 

verb
  • To be anxious, to worry. 

  • To be agitated; to rankle; to be in violent commotion. 

  • To decorate or ornament, especially with an interlaced or interwoven pattern, or (architecture) with carving or relief (raised) work. 

  • In the form fret out: to squander, to waste. 

  • To press down the string behind a fret. 

  • To cut through with a fretsaw, to create fretwork. 

  • To be chafed or irritated; to be angry or vexed; to utter peevish expressions through irritation or worry. 

  • To fit frets on to (a musical instrument). 

  • To be worn away; to chafe; to fray. 

  • To have secondary fermentation (fermentation occurring after the conversion of sugar to alcohol in beers and wine) take place. 

  • To chafe or irritate; to worry. 

  • To gnaw; to consume, to eat away. 

  • To form a pattern on; to variegate. 

  • To bind, to tie, originally with a loop or ring. 

  • To make rough, to agitate or disturb; to cause to ripple. 

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. 

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