Allows to define properties which will have proper units displayed in the interface. The internal storage is expected to be seconds (which matches how other times are stored in Blender). Is not immediately used in Blender, but is required for the upcoming feature in Cycles X (D11526) The naming does not sound very exciting, but can't think of anything better either. For test it probably easiest to define FloatProperty with subdtype of TIME_ABSOLUTE. Differential Revision: https://developer.blender.org/D11532