Shader Time in Blueprint

I have a water surface with waves that are computed in the shader. Now I need the same computation in blueprint to get the height of the wave at a specific position. I transfered the calculation from material to blueprint but there is a difference between the material and the blueprint. I think the times that are used for the calculation does not match. In the material I used the “Time” node with unchecked “Ignore Pause” and unchecked “Period”. In blueprint I used “Get Game Time in Seconds”.
Is there any other time in blueprint I can use that matches the material time?

I found a solution for my needs: My blueprint sets the time of the shader every frame now.