długi czas

After this my stay at Hamburg was not of long duration.

They kissed again with slightly more pressure and longer duration.

However this would have been too strenuous for a longer duration.

He said the test "will probably generate more data than everything else they've done to date" because of its long duration.

In contrast, an activity is a more complex collection of behavior that may run for a long duration.

Like the sport, the parties are extreme and of long duration.

We know only that it brought darkness and cold of long duration.

If he were right, this was going to be a war of long duration.

However, large trees can often live with the infections for a longer duration (up to several years).

Their marriage was of long duration but produced no children.