disintegrate vs spalt

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. 

spalt

verb
  • To break off pieces, or have them broken off, especially with an axe etc; to splinter. 

noun
  • Spelter. 

adj
  • Heedless; clumsy; pert; saucy. 

  • Brittle. 

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