black jack vs luderick

black jack

noun
  • Caranx lugubris, a gamefish 

  • Sphalerite. 

  • Bidens spp., from the family of Asteraceae 

luderick

noun
  • The fish Girella tricuspidata. 

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