«ومقيد به: وهو المؤقت، وهو نوعان»
The other commanded category is temporally restricted and itself has two types.
Zarf (container): time accommodates the act, such as the interval allotted to an obligatory prayer.
Mi'yar (measure): the span of time measures out the act, as in fasting.
This is more than a scheduling distinction: it affects the possibility of performing other acts of the same kind, specification through intention, and the legal role of time.