aircraft vs shipping

aircraft

noun
  • A vehicle capable of atmospheric flight due to interaction with the air, such as buoyancy or lift 

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 aircraft and shipping occurred in a corpus of books? (source: Google Ngram Viewer )