Returns a HealthKit unit for measuring time, using second units with the provided prefix.
- iOS 8.0+
- Mac Catalyst 13.0+
- watchOS 2.0+
A valid metric prefix value. For the complete list of prefix values, see
A HealthKit unit for measuring time based on seconds and the provided prefix.
This method is used to create prefixed versions of seconds. Common uses include creating millisecond units, as shown below.