accumulate vs disperse

accumulate

adj
  • Collected; accumulated. 

verb
  • To gradually grow or increase in quantity or number. 

  • To heap up in a mass; to pile up; to collect or bring together (either literally or figuratively) 

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 accumulate and disperse occurred in a corpus of books? (source: Google Ngram Viewer )