potting shed vs woodshed

potting shed

woodshed

noun
  • A place where punishments or reprimands are administered. 

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

verb
  • To practice or rehearse using a musical instrument. 

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