allay vs dispel

allay

noun
  • Alleviation; abatement; check. 

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

  • To alleviate; to abate; to mitigate. 

dispel

noun
  • An act or instance of dispelling. 

verb
  • To drive away or cause to vanish by scattering. 

  • To remove (fears, doubts, objections etc.) by proving them unjustified. 

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