cultch vs spoilage

cultch

noun
  • Rubbish; debris; refuse. 

  • Empty oyster shells and other substances laid down on oyster grounds to furnish points for the attachment of the spawn of the oyster. 

  • Young or seed oysters together with the shells and other objects to which they are usually attached. 

spoilage

noun
  • The part of something that has spoiled. 

  • The process of spoiling. 

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