duck's arse vs ducktail

duck's arse

noun
  • A hairstyle in which the hair is swept back along the sides of the head to meet in a point at the back, thus resembling the tail feathers of a duck. 

ducktail

noun
  • A hairstyle in which the hair is swept back into an upturned point at the back. 

How often have the words duck's arse and ducktail occurred in a corpus of books? (source: Google Ngram Viewer )