hangnail vs stiletto heel

hangnail

noun
  • A pointed upper corner of the toenail (often created by improperly trimming by rounding the corner) that, as the nail grows, presses into the flesh or protrudes so that it may catch (“hang”) on stockings or shoes. 

  • A loose, narrow strip of nail tissue protruding from the side edge and anchored near the base of a fingernail or toenail. 

stiletto heel

noun
  • A heel of a shoe that is very high and narrow, at least 10 centimeters (4 inches). 

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