dragger vs power car

dragger

noun
  • A vehicle used in drag racing. 

  • A car thief. 

  • A trawler. 

  • Something that drags. 

  • One who takes part in drag racing. 

power car

noun
  • A vehicle equipped with machinery for supplying heat or electrical power to other parts of a train. 

  • A vehicle that propels, and commonly also controls, a passenger train or tram, often as the lead vehicle. 

  • Antonym: trailer car 

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