woodshed vs woolshed

woodshed

noun
  • An enclosed, roofed structure, often an outbuilding, used primarily to store firewood. 

  • A place where punishments or reprimands are administered. 

verb
  • To practice or rehearse using a musical instrument. 

woolshed

noun
  • A shed where sheep are shorn. 

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