disintegrate vs fade (away)

disintegrate

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

  • To fall apart, break up into parts. 

  • To undo the integrity of, break into parts. 

fade (away)

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