420 vs salmon and trout

420

noun
  • Cannabis. 

  • A particular type of monohull dinghy with two sails, designed for two people. 

adj
  • Pertaining to the consumption of cannabis or to cannabis culture. 

salmon and trout

noun
  • snout: tobacco or cigarettes. 

How often have the words 420 and salmon and trout occurred in a corpus of books? (source: Google Ngram Viewer )