coalition vs dispersal

coalition

noun
  • A temporary group or union of organizations, usually formed for a particular advantage. 

  • The collective noun for a group of cheetahs. 

dispersal

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

  • A dispersal prison. 

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