From Longman Dictionary of Contemporary Englishthe wheel of fortune/life/time etcthe wheel of fortune/life/time etcthe way in which things change in life, or in which the same things seem to happen again after a period of time We are powerless to stop the wheel of history. → wheel
Examples from the Corpus
the wheel of fortune/life/time etc• And, as the wheel of fortune continues on its inexorable cycle, values are likely to start going up again soon.• Then the wheel of fortune turned. 