There's no way to know how often this sort of thing has happened in the past. We only find out about the cases where a bank is not able to earn back it's loss and runs out of cash. At that point they have to admit they're insolvent.
If the bank was able to earn back the money and become solvent again, then no one outside the bank would know it happened and the bank would have every reason to cover it up to save its reputation.
There's no way to know how often this sort of thing has happened in the past. We only find out about the cases where a bank is not able to earn back it's loss and runs out of cash. At that point they have to admit they're insolvent.
If the bank was able to earn back the money and become solvent again, then no one outside the bank would know it happened and the bank would have every reason to cover it up to save its reputation.