Hello Ghostblades!
Incrementing the “Text Timer” by one every update is basically an update counter for your timeline. I would suggest using a float curve (y = x) from inside the timeline to determine exactly how long it has been running for.
If you want your platform to rotate 90 degrees during the duration of one second, add a float curve with a point at (0,0) and a second one at (1,90) and update the rotation on every update execution, and it will be the same for all of the blueprints no matter what fps you run on!
Cheers,
Carl