Distinguishing temporal statuses in physics and an operational comparison ratio

Physical theories employ several notions of duration that are often treated as if they were interchangeable. In relativity, duration is defined geometrically along timelike worldlines. In classical and quantum dynamics, time typically appears as a parametric variable governing evolution. In experimental practice, however, durations are realized through physical clocks and concrete dynamical processes. This note proposes a conceptual framework distinguishing three temporal statuses: geometric, parametric, and effective durations. The aim is not to introduce a new theory of time, but to clarify the role and status of durations used in physical reasoning and measurement. A simple dimensionless ratio, , is introduced as an operational device to keep explicit how a realized duration is related to a chosen reference duration. In this sense, the framework is not intended to multiply notions of time, but to make explicit the identification between distinct temporal statuses. Such clarification may provide a useful entry point for re-examining situations in which these identifications are tacitly assumed.