Marine vs salty dog

Marine

noun

  • A member of a marine corps. 

adj

  • Of, or pertaining to, a marine corps. 

salty dog

noun

  • An experienced sailor. 

  • A cocktail consisting of gin or vodka, grapefruit juice, and a salt rim. 

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