crayfish vs small fry

crayfish

noun
  • A freshwater crayfish (family Parastacidae), such as the gilgie, marron, or yabby. 

  • Any of numerous freshwater decapod crustaceans in superfamily Astacoidea or Parastacoidea, resembling the related lobster but usually much smaller. 

  • A rock lobster (family Palinuridae). 

  • The species Thenus orientalis of the slipper lobster family (Scyllaridae). 

  • A freshwater crustacean (family Cambaridae), sometimes used as an inexpensive seafood or as fish bait. 

verb
  • to catch crayfish 

small fry

noun
  • One or more small or immature fish. 

  • One or more relatively small and insignificant persons or things of relatively little consequence, importance, or value. Synonyms: small potatoes, minnow, nobody, no one 

  • One or more children. 

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