hang on vs toenail

hang on

verb
  • To hold, grasp, or grip. 

  • To pay close attention to, or regard with (possibly obsequious) admiration. 

  • To depend upon. 

  • To keep; to store something for someone. 

  • To continually believe in something; to have faith in. 

  • To wait a moment. 

  • To persevere. 

toenail

verb
  • To fasten two pieces of lumber together by applying nails or screws into both boards at an angle. 

noun
  • The thin, horny, transparent plate covering the upper surface of the end of a toe. 

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