'be relieved about' is correct and usable in written English.
You can use it when expressing the feeling of being relieved about something. For example: I was relieved about passing my exams.
Gillard tells the program she hoped Rudd would be "relieved" about having the burdens of office off his shoulders after the June 2010 coup.
Most dogs need to be relieved about every two hours or so. .
One Twitter user quipped that Atlanta should be relieved about Trump's attitude — because it means he probably won't be visiting.
Jun. 19, 2018, 12 47 p.m. Colombia midfielder Carlos Sanchez will be relieved about one thing: His third-minute dismissal in the team's opener with Japan on Tuesday at the World Cup isn't the fastest in the tournament's history.
Here's the problem: Scientists have observed that based on the movement of tectonic plates, with the Pacific plate moving northwest of the North American plate, earthquakes should be relieving about 16 feet of accumulated plate movement every 100 years.
Another thing Ms. Guess was relieved about: Her insurance paid for most of her quit-smoking aids.
