chwilowe po angielsku:

an instantaneous response/reply/reaction

His reaction was instantaneous.

But with induction cooking the heat level is every bit as instantaneous—and as exact—as with gas, yet with none of the many drawbacks of gas (which we will detail later).

The effect would be instantaneous and painless. / In the real world you could meet someone you don't find attractive instantaneously and then get to know them and find that you do quite like them.

Marijuana bust's impact on neighborhood will be fleeting, residents say.

a fleeting glimpse

Driving in a car on the highway, you see a unicorn in the woods, but you only get a fleeting glimpse of it because you’re driving too fast.

Quick interactions can lead to a feeling that sociologists call "fleeting intimacy."

For a fleeting second all I could think was, will this day never end?

We met for one fleeting moment, and then she was gone.

Jonathan said the waves were not only rare, but fleeting.

Art is long, time is fleeting.

Charm is deceptive, and beauty is fleeting; but a woman who fears the LORD is to be praised.