perplexity vs snarl

perplexity

noun
  • Something that perplexes. 

  • The state or quality of being perplexed; puzzled or confused. 

  • In information theory, a measurement of how well a probability distribution or model predicts a sample. 

snarl

noun
  • A squabble. 

  • A slow-moving traffic jam. 

  • A knot or complication of hair, thread, or the like, difficult to disentangle. 

  • An intricate complication; a problematic difficulty; a knotty or tangled situation. 

  • A growl, for example that of an angry or surly dog, or similar; grumbling sounds. 

  • The act of snarling; a growl; a surly or peevish expression; an angry contention. 

verb
  • To be congested in traffic, or to make traffic congested. 

  • To speak crossly; to talk in rude, surly terms. 

  • To growl angrily by gnashing or baring the teeth; to gnarl; to utter grumbling sounds. 

  • To become entangled. 

  • To entangle; to complicate; to involve in knots. 

  • To place in an embarrassing situation; to ensnare; to make overly complicated. 

  • To form raised work upon the outer surface of (thin metal ware) by the repercussion of a snarling iron upon the inner surface. 

  • To complain angrily; to utter growlingly. 

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