entanglement vs perplexity

entanglement

noun
  • The condition of being deeply involved and intricated (with politics, a group, another person, etc.) 

  • An obstruction of cables and spars across a river or harbour entrance. 

  • The condition, or an instance, of being romantically or sexually involved with another person; an affair. 

  • The act of entangling. 

  • An obstruction placed in front or on the flank of a fortification, to impede an enemy's approach. 

perplexity

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

  • Something that perplexes. 

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

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