black frost vs fruit ice

black frost

noun
  • A mist of very cold droplets that freeze upon impact and coat internal organs or parts of a ship with ice, potentially causing it to capsize. 

  • Cold so intense as to freeze vegetation and turn it black, without the formation of hoarfrost. 

fruit ice

noun
  • Synonym of ice (“frozen dessert made of fruit juice, water and sugar”) 

How often have the words black frost and fruit ice occurred in a corpus of books? (source: Google Ngram Viewer )