The Duration attribute in the node property panel shows how long the node was running for.

For a scheduled run you can access the individual run information from the Runs item in the Directory navigation panel (you can also access the individual runs by selecting the schedule in the directory)

and then open a Read-Only copy of a selected run by clicking the data flow link in the properties panel on the right hand side


When the data flow run opens you can then select the required node and inspect the node's Duration attribute as normal.