packing case vs tote

packing case

noun
  • A large, sturdy box or wooden crate used for the secure shipment of goods. 

tote

noun
  • A kind of plastic box used for transporting goods. 

  • Pari-mutuel betting. 

  • A heavy burden. 

  • A tote bag. 

  • A pari-mutuel machine; a totalizator. 

verb
  • To add up; to calculate a total. 

  • To carry or bear. 

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