cheapjack vs third-rate

cheapjack

adj
  • shabby 

noun
  • A peddler, a travelling hawker. 

third-rate

adj
  • Poor, shoddy; less than second-rate. 

  • Of a Royal Navy ship of the line in the Napoleonic Era: having 64–80 guns across two gun decks, a complement of 500–650, and weighing approximately 1,750 tons burthen. 

noun
  • A third-rate ship of the line. 

How often have the words cheapjack and third-rate occurred in a corpus of books? (source: Google Ngram Viewer )