disquiet vs fluster

disquiet

verb
  • To make (someone or something) worried or anxious. 

noun
  • Lack of quiet; absence of tranquility in body or mind 

fluster

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

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

noun
  • A state of being flustered; overwrought confusion. 

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