Varying effects over a region over time

Maybe this is incredibly simple and I've somehow missed documentation on this capability, but I can't for the life of me find out how to change various parts/extents of effects I'm using over time. One of the simplest examples of this would be something like applying a Low Pass Filter and slowly bringing the cut off frequency up over time to finally reach the highest frequency (where you don't hear a filter even being applied), used in many pop songs, etc. Sorry for such a simple question, thanks for your time!