shipment vs transshipment

shipment

noun
  • the act of transporting goods 

  • a load of goods that is transported by any method (not just by ship) 

transshipment

noun
  • The transfer of goods from one means of transport to another. 

  • The shipment of goods via an intermediate destination. 

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