smashup vs splintering

smashup

noun
  • An instance or the result of smashing; that which has been smashed into pieces. 

  • A violent collision involving one or more vehicles. 

  • An abrupt, damaging breakdown or failure. 

splintering

noun
  • The process or result of something being splintered. 

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