'time is slipping' is a correct and usable expression in written English.
You can use it to describe when you feel that a certain period of time is rapidly passing by. For example, "I can't believe how quickly this semester has flown by; it feels like time is slipping away."
The country now has less than forty-eight hours to figure that out, and the time is slipping away.
We may sometimes count pages as we read, but I don't think we look at our watches to see how time is slipping away.
A lack of unity among emerging markets may mean their chance to head the fund this time is slipping away, some experts said.
He wants to prove everybody wrong, he probably feels pressure from his sponsors, and he knows that time is slipping away.
Time is slipping away and a never-ending Brexit hogging the agenda would limit Macron's ability to achieve any part of it.
I started making notes on where my time was slipping away to each day.
He spoke then of how, "even when Goethe was still alive, the spirit of his time was slipping away, becoming the stuff of legend.
Mr. Orna, a 39-year-old postal worker who lives in the Parkchester section of the Bronx, said that he felt time was slipping away, and that he no longer wanted to wait for companionship to find him.
Intelligence and law enforcement officials said the authorities in Boston weighed the risks of some mayhem against their growing fear that time was slipping away and that heavily armed and increasingly dangerous men, and possibly accomplices, could wage new attacks in the Boston area or beyond.
Toward the end of my full-time television career, I felt time was slipping away too quickly and I didn't like the direction it was headed.
