Can Mass Updates be scheduled to run more frequently than once a day? Would I have to trigger it via a suitescript or workflow or something?

Why not just write an M/R or a scheduled script instead?

Not sure what M/R means? And the latter is possible for sure. We simply have a pre-existing mass update that works perfectly so was wondering if there was an easier way besides re-doing the entire logic as a script. If that’s the case, I can live with that.

M/R is a map/reduce