index finger vs loof

index finger

noun
  • the forefinger 

loof

noun
  • The palm of the hand. 

  • The spongy fibers of the fruit of a cucurbitaceous plant (Luffa aegyptiaca). 

  • The after part of the bow of a ship where the sides begin to curve. 

  • The hand, especially, the hand outspread and upturned. 

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