dispersal vs merger

dispersal

noun
  • The act or result of dispersing or scattering; dispersion. 

  • A dispersal prison. 

merger

noun
  • A type of sound change where two or more sounds merge into one. 

  • One that merges. 

  • The legal union of two or more corporations into a single entity, typically assets and liabilities being assumed by the buying party. 

  • An absorption of one or more estate(s) or contract(s) into one other, all being held by the same owner; of several counts of accusation into one judgement, etc. 

  • The act or process of merging two or more parts into a single unit. 

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