Time served is also a term used to indicate a craftsman has spent the required period as an apprentice.
Famous quotes containing the words time and/or served:
“By the time I have clarified a thought, I no longer want to think it.”
—Mason Cooley (b. 1927)
“Oh how unhappy is the prince served by such men who are so easily corrupted.”
—François Rabelais (1494–1553)