dory vs jackfish

dory

noun
  • Any of several different families of large-eyed, silvery, deep-bodied, laterally compressed, and roughly discoid marine fish. 

  • A small flat-bottomed boat with pointed or somewhat pointed ends, used for fishing both offshore and on rivers. 

  • A wooden pike or spear about three metres (ten feet) in length with a flat, leaf-shaped iron spearhead and a bronze butt-spike (called a sauroter), which was the main weapon of hoplites in Ancient Greece. It was usually not thrown but rather thrust at opponents with one hand. 

jackfish

noun
  • A jack (in any of the senses referring to types of fish). 

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