fluster vs gladden

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. 

gladden

verb
  • To cause (something) to become more glad. 

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