escolar vs sablefish

escolar

noun
  • Any fish of species Ruvettus pretiosus, oilfish. 

  • Lepidocybium flavobrunneum, one of the snake mackerels. 

  • Any of several other perciform fish of the family Gempylidae (snake mackerels). 

sablefish

noun
  • A dark-coloured marine fish, Anoplopoma fimbria, of North American Pacific waters. 

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