Seldom. Usually if she's not interrupted the nightmares show up and ruins the night.

I got one of those Garmin activity trackers. After using it for a while, she tried it.

I know they ain't perfect but there's a very stark contrast between her and me, using the same tracker. It'll show me getting typically 4-5 hours of deep sleep when I have a good night. With her it's typically an hour tops, often less than 30 minutes.