flatbed vs freighter

flatbed

noun
  • An open freight vehicle with no sides, designed to carry heavy or outsized loads. 

  • A railway freight car with no sides; a flatcar. 

  • A document scanner with a flat bed. 

adj
  • Having a flat bed. 

verb
  • To transport by flatbed. 

freighter

noun
  • One for whom freight is transported. 

  • One employed in receiving and forwarding freight. 

  • An aircraft used mainly to carry freight; a cargo aircraft or cargo plane. 

  • A vessel used mainly to carry freight; a cargo ship. 

  • One who loads a ship, or one who charters and loads a ship. 

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