I have a few questions about the five-year nissaya period that newly ordained bhikkhus undergo, during which they live in dependence on a teacher at a monastery.
1) Where are the origins of this practice in the Vinaya? Please provide a citation link if you can.
2) Does this recommendation come from the Buddha himself or from a later commentator?
3) What is done during these five years? Monks have told me that it involves the study of the patimokkha and suttas, and it is likely that one would also study Pali during this time. I am curious if there is anything else done in this period, and why five years is allotted.