allay vs dissipate

allay

verb
  • To alleviate; to abate; to mitigate. 

  • To make quiet or put at rest; to pacify or appease; to quell; to calm. 

noun
  • Alleviation; abatement; check. 

dissipate

verb
  • To use up or waste; squander. 

  • To drive away, disperse. 

  • To vanish by dispersion. 

  • To cause energy to be lost through its conversion to heat. 

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