escolar vs skil

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). 

skil

noun
  • Synonym of sablefish 

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