diffuse vs disperse

diffuse

adj
  • Everywhere or throughout everything; not focused or concentrated. 

  • Wordy; verbose. 

verb
  • To be spread over or through as in air, water, or other matter, especially by fluid motion or passive means. 

  • To spread over or through as in air, water, or other matter, especially by fluid motion or passive means. 

disperse

adj
  • Scattered or spread out. 

verb
  • To break up and disappear; to dissipate. 

  • To scatter in different directions. 

  • To disseminate. 

  • To separate rays of light, etc., according to wavelength; to refract. 

  • To distribute throughout. 

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