dispersion vs missingness

dispersion

noun
  • The degree of scatter of data. 

  • The removal of inflammation. 

  • The state of being dispersed; dispersedness. 

  • The separation of visible light by refraction or diffraction. 

  • A process of dispersing. 

missingness

noun
  • The manner in which data are missing from a sample of a population. 

  • Absence. 

  • Missing data; omission. 

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