equipage vs oil rig

equipage

noun
  • Equipment or supplies, especially military ones. 

  • A type of horse-drawn carriage. 

  • The carriage together with attendants; a retinue. 

oil rig

noun
  • A rig, consisting of platform and machinery, used to drill for oil and other petroleum products like natural gas. 

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