That's how long you were gone.
3 seconds sound clip from the Beetlejuice movie soundboard.
You can hear this line at 00:09:27 in the Blu-ray version of the movie.
Quote context
[...]
- I'm gonna go back down to the bridge and retrace our steps.
- Oh, Barbara, you are not gonna believe...
- What?
- That's how long you were gone.
- I have to show you something. Look.
- There's that. And there's that.
- Handbook for the Recently Diseased.
[...]