A very famous and well-used catchphrase is ***greatest of all time***. Sometimes an extra word is put in, between _greatest_ and _of_. For example: * Greatest [**swimmer**][1] of all time * Greatest [**Olympian**][2] of all time * Greatest [**athlete**][3] of all time ---------- By the way, I'm not claiming the Phelps is any of those things; I'm just showing how the phrase can be used. [1]: http://www.thedailybeast.com/articles/2016/08/09/is-michael-phelps-the-greatest-swimmer-of-all-time.html [2]: http://www.teamusa.org/News/2016/August/10/Now-And-Forever-Michael-Phelps-Has-Become-The-Greatest-Olympian-Of-All-Time [3]: https://www.theodysseyonline.com/phelps-greatest-athlete-time