balmoral vs overshoe

balmoral

noun
  • A Scottish cap with a flat top and a plume but no brim; a blue bonnet. 

  • A heavy walking shoe. 

  • A figured woollen petticoat. 

  • An Oxford shoe. 

overshoe

noun
  • To prevent damage to a floor. 

  • To protect from water or mud. 

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