Transition Node between 2 floats.

is there any node that takes a float for example Text Size.
I have 2 variables
Var1 = 10
Var2 = 20
And i want to set a node that will set a time translating between these 2 nodes. For example 1s.

FInterp To maybe? FInterp To | Unreal Engine Documentation

If you wanted more specific control you could use a float timeline. Door Tutorial has a section with an example: