I know of no requirements for any PhD that are hingent upon one having been (or not) a practicing doctor for a length of time.
The Jews spent 40 years in the wilderness.
Seventy years
Nelson Mandela spent 27 years in prison in South Africa; from 1964-82.
Siddhartha spent several years fasting and practicing deep meditation as a form of asceticism. He believed that by renouncing the pleasures of the body, he could achieve spiritual enlightenment. However, Siddhartha eventually realized that extreme asceticism was not the path to enlightenment and shifted to a middle way, which balanced self-discipline with self-care.
In my style, in addition to having made it through the other ranks and practicing for over 40 years, you have to be at least 60 years of age to be considered.
In order to have a criminal record spent in the UK, a number of years must pass. It depends on the crimes you were charged with.
No British Monarch has ruled for that long yet. Henry III spent 56 years on the throne. Edward III spent 50 years on the throne. Elizabeth I spent 55 years on the throne. George III spent 60 years on the throne. Victoria spent 64 years on the throne. Elizabeth II has been on the throne for 60 years.
He was originally a cardinal from Germany but then spent a number of years working in the Vatican.
Moses lived 120 years, so 40years were spent in Egypt, another 40 years were spent with his family in Midian and the last 40 years were spent leading the people in the wilderness.
Havn't been for years now...
Jehoiachin spent 37 years in prison
to the State agency that granted the Medicaid.