“The Mishnah Berurah’s case of oines is where she was in prison. Anything short of complete oines, the minhag/din is to add.
Sleeping through is not an oines. She should have set an alarm or some type of shomer.
If you want some more cases spelled out, see R’ Ribiat’s sefer on 39 Melachos.”
Thank you. I will try to look into it, b”n. I was assuming that shocheich meant “forgetting” and didn’t mean “anything that is not a pure ones”. Maybe I’m wrong, and I will have to look into it.
It does seem to me that the category of “shocheich” may not be as broad as you are saying. The example of “ones” given in SS”K is a lady taking care of her sick son. That does not sound like a “complete ones” to me, and in fact sounds similar to my cases and perhaps yours and LB’s examples as well.
Also, he writes that if someone made a mistake, it is not clear if she gets the penalty. That doesn’t sound like “complete ones” to me.
Regarding sleeping, personally, I can’t handle alarm clocks or being woken up by someone. I have a pretty good mental alarm clock, B”H, and when it doesn’t work, it usually means that I really needed the sleep. Also, what if she just conked out? I would think that would be “ones”.