loof vs lupper

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. 

lupper

noun
  • A finger. 

  • A meal or snack eaten between the normal times for lunch and supper. 

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