How to Increase Tiling Effect on SimpleGrassWind node?

I’m looking for a way to increase the tiling effect on the SimpleGrassWind node in the material editor. I need the effect to be smaller in size, but the node only provides Intensity, Weight, and Speed. My guess is that is has something to do with the Additional WPO input, but I have no clue how I’d set that up.
Any ideas?