dumper truck vs juggernaut

dumper truck

noun
  • A dump truck 

juggernaut

noun
  • A large, cumbersome truck or lorry, especially an artic. 

  • An institution that incites destructive devotion or to which people are carelessly sacrificed. 

  • A literal or metaphorical force or object regarded as unstoppable, that will crush all in its path. 

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