long finger vs middle finger

long finger

noun
  • The middle finger. 

  • A state of postponement or procrastination. 

  • Hire purchase or credit. 

middle finger

noun
  • The finger between the forefinger and the ring finger 

  • An obscene gesture directed towards another as an insult, made by sticking up the middle finger of a hand. 

  • An insult directed at someone. 

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