baggage vs steam engine

baggage

noun
  • An army's portable equipment; its baggage train. 

  • Portable cases, large bags, and similar equipment for manually carrying, pushing, or pulling personal items while traveling 

  • Factors, especially psychological ones, which interfere with a person's ability to function effectively. 

  • Uncountable synonyms: luggage; gear; stuff 

steam engine

noun
  • A steam locomotive. 

  • A piston engine driven by steam (as contrasted, for example, with a steam turbine). 

  • Any heat engine that uses steam as its primary working fluid to do mechanical work. 

How often have the words baggage and steam engine occurred in a corpus of books? (source: Google Ngram Viewer )