regimen

A regulated system, as of medication, diet, or exercise, used to promote health or treat illness or injury.

A procedure, program, or routine.

A systematic way of managing something.

Governmental rule or control.

In physical geography, the physical characteristics of a river, especially of a graded river; also, the condition of a river or current when it does not actively build up or wear down its course; in general, grade. See the extract.