ravel vs throttle

ravel

verb
  • To become entangled or snarled. 

  • 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). 

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

  • 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. 

throttle

verb
  • To strangle or choke someone. 

  • To utter with breaks and interruption, in the manner of a person half suffocated. 

  • To have the throat obstructed so as to be in danger of suffocation; to choke; to suffocate. 

  • To control or adjust the speed of (an engine). 

  • To breathe hard, as when nearly suffocated. 

  • To cut back on the speed of (an engine, person, organization, network connection, etc.). 

noun
  • A valve that regulates the supply of fuel-air mixture to an internal combustion engine and thus controls its speed; a similar valve that controls the air supply to an engine. 

  • The lever or pedal that controls this valve. 

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