N과 동시에
Use this pattern to show that two things happen or are felt at the same time. It often sounds slightly formal and works well with nouns. Example: '감사함과 동시에 걱정도 들었다.' You can reuse it when one feeling or event comes together with another.
감사함과 동시에 걱정도 들었다.
I felt grateful and at the same time worried.
