midden vs scrapyard

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. 

scrapyard

noun
  • A junkyard, a place where scrap is stored, discarded or resold. 

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