There is no separate Time-triggered Transaction for Create Third Count Task. Create Third Count Task is based on Create Count Task Time-Triggered Transaction.
Typically for a Create Third Count Task, the TaskGranularity is set to VARIANCE, while the TaskGenerationLevel is set to LOCATIONS_WITH_VARIANCE.
For more information, see For more information, see Section A.2.7, "Create Count Task" Create Count Task Time-Triggered Transaction.