When does troubled vocab refresh?

There are a batch of words I’m failing to grasp recently and I’d like to cram those. I would think that selecting them from “Troubled Vocab” would be the answer, but none of those items are there. Is there some specific time the list refreshes, or is there something I don’t understand about the feature?

I’m not sure on the specifics, but I don’t think they refresh periodically as I have items there that have been there for a very long time. I’ve checked all of mine and not a single one of them has an accuracy over 50% That seems like a logical cutoff point for me.

I would recommend cramming grammar with ghosts instead (assuming you have them turned on). The things you’ve recently gotten wrong are likely to have ghosts anyway.

maybe stupid question, but I am new. What do you mean with ghosts?

No, I mean from the cram feature.

IF you scroll further down you see the cram option “Grammar with Ghosts”, but I guess to have items in that category you need to have the ghost feature activated for reviews in general, so troubled items create ghost reviews for you.

(My settings for ghost reviews)

In your review settings, you can activate the ghost review feature for failed items. With that you get more repetition besides the usual SRS interval to help you with troubling items.

You can see them here, if you have some (don’t mind my low numbers, I’m a slow butterfly, lol):