parking lot vs shipment

parking lot

noun
  • An open area, generally paved, where automobiles may be left when not in use. 

  • A road blocked by stop-start traffic. 

shipment

noun
  • the act of transporting goods 

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

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