cacolet vs debris

cacolet

noun
  • A single litter mounted on a pack animal. 

  • One of a pair of chairs or litters mounted on a pack animal (horse, mule, camel) 

debris

noun
  • Litter and discarded refuse. 

  • Large rock fragments left by a melting glacier etc. 

  • Rubble, wreckage, scattered remains of something destroyed. 

  • The ruins of a broken-down structure. 

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