debris vs midden

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. 

midden

noun
  • A refuse heap usually near a dwelling. 

  • A shelter made of vegetation and other materials by packrats. 

  • An accumulation of dried urine and fecal deposits made by hyraxes. 

  • A prehistoric pile of bones and shells. 

  • A dungheap. 

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