You use more than usually to show that something shows even more of a particular quality than it normally does. She felt more than usually hungry after her excursion He was more than usually depressed by problems at work. = unusually. used to talk about what happens on most occasions or in most situations
If something usually happens, it is the thing that most often happens in a particular situation. The best information about hotels usually comes from friends and acquaintances who have been there They ate, as they usually did, in the kitchen Usually, the work is boring Offering only one loan, usually an installment loan, is part of the plan. = generally, normally