gripe vs knag

gripe

noun
  • The piece of timber that terminates the keel at the fore end; the forefoot. 

  • A wire rope, often used on davits and other life raft launching systems. 

  • A complaint, often a petty or trivial one. 

  • The compass or sharpness of a ship's stern under the water, having a tendency to make her keep a good wind. 

  • Pinching and spasmodic pain in the intestines. 

  • An assemblage of ropes, dead-eyes, and hocks, fastened to ringbolts in the deck, to secure the boats when hoisted. 

verb
  • To suffer griping pains. 

  • To tend to come up into the wind, as a ship which, when sailing close-hauled, requires constant labour at the helm. 

  • To annoy or bother. 

  • To complain; to whine. 

knag

noun
  • A knot in a piece of wood or the base of a branch 

  • A pointed rock or crag 

  • A small cask or barrel; a keg or noggin 

  • A short spur or stiff projection from the trunk or branch of a tree, such as the stunted dead branch of a fir 

  • A peg or hook for hanging something on 

verb
  • To hang something on a peg 

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