dampen vs dispel

dampen

verb
  • To become damped or deadened. 

  • To lessen; to dull; to make less intense (said of emotions and non-physical things). 

  • To become damp or moist. 

  • To make damp or moist; to make moderately wet. 

dispel

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

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

noun
  • An act or instance of dispelling. 

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