hoax vs pull the wool over one’s eyes

hoax

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

noun
  • Anything deliberately intended to deceive or trick. 

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 )