marlin vs merlion

marlin

noun
  • Any species of game fish belonging to either of the genera Tetrapturus or Makaira. Every such species has a pointed, spear-like projection of the upper jaw. 

merlion

noun
  • Often Merlion: a symbolic creature having the head of a lion and the body of a fish, which is a national symbol of Singapore; an image, statue, or other depiction of this creature. 

  • A depiction of a bird similar to a house martin or swallow with stylized feet; a martlet. 

  • A fictional creature of similar make-up. 

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