loof vs thumb

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. 

thumb

noun
  • The short thick digit of the hand that for humans has the most mobility and can be made to oppose (moved to touch) all of the other fingers. 

  • A thumbnail picture. 

  • The part of a slider that may be moved linearly along the slider. 

verb
  • To turn the pages of (a book) in order to read it cursorily. 

  • To manipulate (an object) with the thumb; especially, to pull back the hammer or open the cylinder of a revolver. 

  • To hitchhike 

  • To touch or cover with the thumb. 

  • To soil or wear with the thumb or the fingers; to soil, or wear out, by frequent handling. 

  • To fire (a single action revolver) quickly by pulling the hammer while keeping the trigger depressed. 

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