railroad truck vs tipper

railroad truck

noun
  • A chassis or framework-like structure underneath a railroad car to which wheel axles (and, hence, wheels) are attached through bearings. (Not to be confused with railway truck or railtruck, which are British English synonyms of railroad car) 

tipper

noun
  • A goods vehicle with a tippable body, used for carrying loose materials such as gravel or rubble; a tipper truck or lorry. 

  • A cutting tool used to cut off or trim the horns of stock animals; a horn tipper. 

  • A kind of ale brewed with brackish water obtained from a particular well. 

  • A device for loading goods such as coal by tipping them. 

  • A small moustache. 

  • Someone who tips; someone who gives a gratuity. 

  • A person who tips or discharges a load, or dumps waste (especially illegally with the latter). 

  • One who gives private hints about racing or financial speculation, etc.; a tipster. 

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