hoax vs pull the wool over one’s eyes

hoax

noun
  • Anything deliberately intended to deceive or trick. 

verb
  • To deceive (someone) by making them believe something that has been maliciously or mischievously fabricated. 

pull the wool over one’s eyes

How often have the words hoax and pull the wool over one’s eyes occurred in a corpus of books? (source: Google Ngram Viewer )