I was trying to do rollup fields to find the most recent of an array and there were too many form collisions at the minute level. Unfortunately creating a string output (with seconds) with this information is not helpful, because then you'd need to r...

100% agree with this, the gap between 1 year and 5 years is way too big. If not dynamic, at least give us 2 years, please.

The cleanest way to do this is to have a separate column for each and if you want to see them concatenated, use a formula field to do so. You can then hide the source columns. From a form input perspective, I would recommend using fillout.com integra...