allis shad vs landing net

allis shad

noun
  • A herring-like fish (Alosa alosa), of the eastern Atlantic that migrates to fresh water to spawn. 

landing net

noun
  • A fishnet mounted on a ring which is connected to a handle, used by anglers to secure a catch when pulling it out of the water by the line to which it is hooked. 

How often have the words allis shad and landing net occurred in a corpus of books? (source: Google Ngram Viewer )