What is typically referred to when stating someone’s age in terms of the number of years?

When stating someone’s age in terms of the number of years, the unit of measurement being used is "years." This concept is quite common and easily understood, as age is typically assessed based on the total number of completed years since birth. For example, if someone is said to be 10 years old, this means they have completed 10 full years of life.

Using other units like months, days, or weeks to describe age is less common and would typically be used in specific contexts or for younger children, where various stages of growth and development might be more relevant. However, the standard and most recognized way to convey age to the general public is in years, which makes it a clear and straightforward choice. This is why stating someone's age in terms of years is the accepted and conventional practice.