But how long did it last?

但它持续多久了？

youdao

How long did it last?

持续了多久？

youdao

How long did it last?

持续了多长时间？

youdao

About how long did it last?

WHITEHOUSE: Press Briefing

If cramps bother you frequently, consult with your doctor, who may advise you to keep a cramp diary to try to pinpoint or prevent the problem -- what were you doing at the time, how long did it last, what did you do to make it feel better, what did you do earlier in the day?

CNN: What causes muscle cramps?

And if they did, how long might it last?

WSJ: Our Blindness