The time period over which a property may be profitably utilized is known as its

Physical life refers to the total duration a property remains usable before it deteriorates or becomes obsolete, irrespective of profitability. This measure focuses on the actual lifespan of the physical structure rather than its financial viability, making it less relevant when discussing periods of profitable utilization.

Amortized life pertains to the time frame over which an asset’s cost is spread out, often for accounting purposes. This term relates to financial practices rather than the practical profitability of utilizing a property, thereby failing to define the period of economic viability.

Net life is a term that can sometimes refer to the remaining useful life of an asset after accounting for depreciation; however, it does not specifically address the profitability aspect. It focuses more on the remaining lifespan rather than the economic returns generated during that period, which is pivotal in understanding a property's economic life.