engineering vs machine room

engineering

noun
  • The area aboard a ship where the engine is located. 

  • The application of mathematics and the physical sciences to the needs of humanity and the development of technology. 

  • Designates office area of the professional engineering staff. 

  • Actions controling the motion, shape, and/or substance of any physical object(s). 

machine room

noun
  • A limited-access room in a larger building dedicated to HVAC equipment and other machinery. 

  • A dedicated room for computers and related data processing equipment, often having a raised floor, abundant and dedicated air conditioning, and specialized power supply and fire suppression systems. 

How often have the words engineering and machine room occurred in a corpus of books? (source: Google Ngram Viewer )