hours hr are a metric unit used for measuring time generally used for values between 025 and 72
time_unit is measure. hours is units_of_time. minute is time_unit. one_unit_of_time is minute. hour is clock_time. hour is time_unit. one_unit_of_time is not hour. one_unit_of_time is hour. unit_of_time is unit_of_measure. mean_time is time_unit.