about time vs soon

about time

adv
  • Close to the right time. 

  • Far past the desired time. 

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

soon

adv
  • Within a short time; quickly. 

  • Readily; willingly; used with would, or some other word expressing will. 

  • Early. 

adj
  • Short in length of time from the present. 

  • Used as an alternative to express 'to be going to' in the form 'to be soon to' 

  • early 

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