drilling rig vs hardware

drilling rig

noun
  • An oil rig. 

  • Used other than figuratively or idiomatically: see drilling, rig. 

hardware

noun
  • Equipment. 

  • Electronic equipment. 

  • The part of a computer that is fixed and cannot be altered without replacement or physical modification; motherboard, expansion cards, etc. Compare software. 

  • Fixtures, equipment, tools and devices used for general-purpose construction and repair of a structure or object. Also such equipment as sold as stock by a store of the same name, e.g. hardware store. 

  • Metal implements. 

  • A firearm. 

  • Medals or trophies. 

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