smashup vs train wreck

smashup

noun
  • A violent collision involving one or more vehicles. 

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

  • An abrupt, damaging breakdown or failure. 

train wreck

noun
  • The aftermath of a train crash. 

  • A disaster, especially one which is large in scale and readily seen by public observers. 

  • Someone (especially a woman) who is unbalanced and considered a mess, a disaster, one who is suffering personal ruin. 

verb
  • To ruin utterly and catastrophically, to cause to end in disaster. 

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