"during a challenging time" is correct and usable in written English.
It can be used anytime to refer to a period of difficulty. For example: "My family helped each other through love and support during a challenging time."
The challenge is that we are leading during a challenging time, and the reward is being a part of an agency that delivers outstanding geospatial intelligence, analysis and products that make a difference.
Mr. Maisel was at the Fed during a challenging time.
The firm has been able to grow during a challenging time for the securities industry, and not just because it does a good job of advising clients and executing trades for them, Mr. Quinn said.
It was always our sense, early in the series, that "Modern Family" was appealing to people because, among other reasons, it was providing a respite during a challenging time in the country.
Despite suffering many difficult defeats during a challenging time for Scottish rugby, he feels the current squad bears more potential than any he has been part of.
It's difficult to tell how successful Nestle marketing executive Lars Olofsson will be when he takes the helm of French retail chain Carrefour next year, but his appointment on Tuesday led to a sense of optimism from investors during a challenging time for the sector.
I would not need to explain my trans identity during such a challenging time as labour, and the midwives could likely manage the medical needs of myself and my baby.
Small problems arose for Mr. Phetteplace: The referendum was held during the holiday season, a challenging time to get out a vote.
Of course we must always show solidarity with our central and eastern European Nato allies during what is obviously a challenging time for them.
"We would like to take this opportunity to thank you for your patience and co-operation during what has been a challenging time for our trust," said a trust statement.
Mr Obama made no mention of the negotiations as he welcomed Saudi Arabian leaders to the Oval Office, saying only that the two countries were building their relationship "during a very challenging time".
