easy as pie vs impossible

easy as pie

adj

  • Very easy. 

impossible

adj

  • Not possible; not able to be done or happen. 

  • Very difficult to deal with. 

noun

  • A skateboard trick consisting of a backflip performed in midair. 

  • An impossibility. 

How often have the words easy as pie and impossible occurred in a corpus of books? (source: Google Ngram Viewer )