ambiguate vs fluster

ambiguate

verb
  • To make more ambiguous. 

fluster

verb
  • To confuse; befuddle; throw into panic by making overwrought with confusion. 

  • To be in a heat or bustle; to be agitated and confused. 

noun
  • A state of being flustered; overwrought confusion. 

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