think of vs wish

think of

verb
  • Used other than figuratively or idiomatically: see think, of. (to think on the subject of) 

  • To create in one's mind; to originate an idea through thought. 

wish

verb
  • To bestow (a thought or gesture) towards (someone or something). 

  • To hope (for a particular outcome), even if that outcome is unlikely to occur or cannot occur. 

  • To recommend; to seek confidence or favour on behalf of. 

  • I wish I could go back in time and teach myself what I know now. 

  • To desire; to want. 

  • To request or desire to do an activity. 

noun
  • The thing desired or longed for. 

  • An expression of such a desire, often connected with ideas of magic and supernatural power. 

  • A desire, hope, or longing for something or for something to happen. 

  • A water meadow. 

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