cumshaw vs scrapheap

cumshaw

noun
  • A gratuity or tip as thanks for a service 

verb
  • To give or make a present to. 

scrapheap

noun
  • A collection of discarded or rejected items or ideas. 

  • A pile in which junk is discarded. 

  • A junkyard. 

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