@JTT,
Back in the lab, it was understood that there was protein breakdown that went along with the freeze-thaw cycles in regular refrigerator freezers. To keep a specimen at its best, we froze them at -70 degrees in room sized freezers built for the task, and this type of freezer (not inexpensive) did not go through freeze thaw cycles, keeping steady temp.
Me, I keep a lot of items in the freezer that tops my refrigerator. I package portions after I cook them, freeze, and remove them one at a time. I don't refreeze all that much.