World tick update much faster than 20 times a second

I've written a basic procedure with the goal of executing a task every real-life hour. However I'm finding that setting a global procedure of "On world tick update" is much faster than the expected 20 TPS. I'm not sure on an exact value; but it's somewhere around 4x faster than expected. I've found some posts that suggested this was due to client sided FPS; but adjusting the client FPS, or running it on a server did not affect the speed.