disentangle vs perplex

disentangle

verb
  • To free something from entanglement; to extricate or unknot. 

  • To unravel; to separate into discrete components or units. 

  • To become free or untangled. 

perplex

verb
  • To involve; to entangle; to make intricate or complicated. 

  • To cause to feel baffled; to puzzle. 

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