dumpyard vs scrapheap

dumpyard

noun

  • A junkyard. 

scrapheap

noun

  • A junkyard. 

  • A pile in which junk is discarded. 

  • A collection of discarded or rejected items or ideas. 

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