dispel vs dissipate

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. 

dissipate

verb
  • To vanish by dispersion. 

  • To drive away, disperse. 

  • To use up or waste; squander. 

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

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