fizzle vs hebetate

fizzle

verb
  • To sputter or hiss. 

  • To fail to generate the expected yield when exploded during testing. 

  • To decay or die off to nothing; to burn out; to end less successfully than previously hoped. 

noun
  • Failure of an exploding nuclear bomb to meet its expected yield during testing. 

  • An abortive effort; a flop or dud. 

  • A state of agitation or worry. 

  • A spluttering or hissing sound. 

hebetate

verb
  • To render obtuse; to dull; to blunt. 

adj
  • obtuse; dull 

  • Having a dull or blunt and soft point 

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