casket vs shipping container

casket

noun
  • A little box, e.g. for jewellery. 

  • A gasket. 

  • An urn. 

  • A coffin. 

verb
  • To put into, or preserve in, a casket. 

shipping container

noun
  • A standardized reusable steel box used for the storage and transportation of materials and products within a freight transport system. 

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