disband vs disintegrate

disband

verb
  • To break up or (cause to) cease to exist; to disperse. 

disintegrate

verb
  • To fall apart, break up into parts. 

  • To cause to break up into infinitesimal parts through the use of a disintegrator. 

  • To undo the integrity of, break into parts. 

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