midden vs scrapheap

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. 

scrapheap

noun
  • A pile in which junk is discarded. 

  • A junkyard. 

  • A collection of discarded or rejected items or ideas. 

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