New feature request, version of the "date first taken" filter.

I wanted to request that the "date first taken" filter be modified so that you can more easily filter for questions that you have not attempted in a long time, e.g., perhaps adding an indicator of how many days ago you last attempted a question (presumably a variant of the "most recent" filter could accomplish this as well). As someone who has drilled a lot of questions throughout my LSAT studying process and only drills a certain subset of the material (questions of a specific type of a certain difficulty level, as per my analytics), it would be great to be able to more easily discern material that I have not encountered in a while. Thank you!