I booked a hotel, secured it with a credit card, and frozen some of my money. Why haven't I received the unfreezing information from the bank after a few days?

This is normal. Starting to freeze is pre-authorization. Basically, every bank will have information tips. After thawing, the pre-authorization is revoked, and most bank cards are not prompted (not absolutely, a few will still have information). Moreover, the credit card guarantee is made by the intermediary, not the hotel. They also need to check and confirm the procedures between them and the hotel. If you have checked in, it will be cancelled and there will be a time difference, but don't worry. This is no problem. Even if the authorization is not revoked, the pre-authorization will be automatically cancelled after 1 month. So you can rest assured. I hope my answer is helpful to you and can be adopted. Thank you~