ankle boot vs bootee

ankle boot

noun
  • A boot that rises up to the ankle 

bootee

noun
  • An overshoe or sock worn to cover dirty shoes or feet. 

  • A thick sock worn under a wetsuit. 

  • A soft, woolen shoe, usually knitted, for a baby or small pet. 

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