about time vs just in time

about time

adv
  • Close to the right time. 

  • Far past the desired time. 

  • Used other than figuratively or idiomatically: see about, time. 

just in time

adv
  • At the last possible moment; just before or within the assigned time. 

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