passenger ship vs shipping

passenger ship

noun
  • A ship whose primary function is to carry passengers. 

shipping

noun
  • Passage or transport on a ship. 

  • The transportation of goods. 

  • The body of ships belonging to one nation, port or industry; ships collectively. 

  • Navigation. 

  • The cost of sending an item or package via postal services. 

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