minibus vs wagon

minibus

noun
  • A small four-wheeled carriage. 

  • A small bus, especially one used as transport for small groups. 

  • A sixteen-seater vehicle used as a taxi. 

  • A combined spending bill for multiple departments that is smaller than an omnibus bill. 

wagon

noun
  • A heavier four-wheeled (normally horse-drawn) vehicle designed to carry goods (or sometimes people). 

  • A vehicle (wagon) designed to transport goods or people on railway. 

  • A kind of prefix used in de Bruijn notation. 

  • Buttocks. 

verb
  • To load into a wagon in preparation for transportation; to transport by means of a wagon. 

  • To travel in a wagon. 

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