ladder vs ravel

ladder

verb
  • Of a knitted garment: to develop a ladder as a result of a broken thread. 

  • To ascend (a building, a wall, etc.) using a ladder. 

  • To arrange or form into a shape of a ladder. 

  • To close in on a target with successive salvos, increasing or decreasing the shot range as necessary. 

noun
  • A length of unravelled fabric in a knitted garment, especially in nylon stockings; a run. 

  • A frame, usually portable, of wood, metal, or rope, used for ascent and descent, consisting of two side pieces to which are fastened rungs (cross strips or rounds acting as steps). 

  • A series of stages by which one progresses to a better position. 

  • In the game of go, a sequence of moves following a zigzag pattern and ultimately leading to the capture of the attacked stones. 

  • The hierarchy or ranking system within an organization, such as the corporate ladder. 

ravel

verb
  • Often followed by up: to form (something) out of discrete elements, like weaving fabric from threads; to knit. 

  • To unwind (a reel of thread, a skein of yarn, etc.); to pull apart (cloth, a seam, etc.); to fray, to unpick, to unravel; also, to pull out (a string of yarn, a thread, etc.) from a piece of fabric, or a skein or reel. 

  • To entwine or tangle (something) confusedly; to entangle. 

  • To confuse or perplex (someone or something). 

  • To become entangled or snarled. 

  • Often followed by out: of a reel of thread or skein of yarn; or a thread on a reel or a string of yarn in a skein, etc.: to become untwisted or unwound. 

  • Often followed by out: of clothing, fabric, etc.: to become unwoven; to fray, to unravel. 

  • In the APL programming language: to reshape (a variable) into a vector. 

noun
  • A thread which has unravelled from fabric, etc.; also, a situation of fabric, etc., coming apart; an unravelling. 

  • A tangled mess; an entanglement, a snarl, a tangle. 

  • A confusing, intricate, or perplexing situation; a complication. 

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