can't wait vs wait for

can't wait

verb
  • To eagerly anticipate; to find it hard to wait for a forthcoming pleasurable event. 

  • To need to be attended to right away. 

wait for

verb
  • To await the arrival of. 

  • To wait until the specified event occurs. 

How often have the words can't wait and wait for occurred in a corpus of books? (source: Google Ngram Viewer )