How long does McDonald's keep their food in the freezer?

Regular meat (10:1) is held for fifteen minutes as well is Quarter meat (4:1).

These are standardized times for them to be held in the UHC (Universal Holding Cabinet).

I'm not sure about the new Angus patties, it's either fifteen or twenty minutes (I lean toward fiften).

If they ignore the timers or reset them then they are violating procedures and health regulations. That would mean they were sitting there longer than permitted.