how to get the FPS computed by Unreal while enforcing fixed frame rate to 999 in settings?

In order to remove the FPS upper limit, I am enforcing fixed frame rate at 999 in the project settings. So when I use the blueprint below, it keeps printing 999 all the time but in fact the FPS shown by Unreal is 60 or some other number (according to what the scene does at that moment obviously).
How can I print the FPS computed by Unreal?


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