scrapheap vs shitbox

scrapheap

noun
  • A pile in which junk is discarded. 

  • A junkyard. 

  • A collection of discarded or rejected items or ideas. 

shitbox

noun
  • A dump; a run-down, messy or disgusting item. 

  • A contemptible person. 

  • An old and decrepit automobile. 

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