List disabled cops with 0 violations

[ychaker]

Thank you for your work, it's all much appreciated. I have a question on whether something is possible.

Is there a way to get the list of cops that are currently disabled but have 0 violations?

This seems like something that should be doable, but I can't find how to do it.
It doesn't need to be an available command, but maybe if I can get some pointers of how to put together a script or something that could get me the answer.

I know we have RuboCop::Cop::Registry that seems to be where I should look, but I'm not sure how to use it.

we can use RuboCop::Cop::Registry.all or RuboCop::Cop::Registry.global to get the list of cops.
we also have enabled?/disabled? as methods in that class, but I don't know what the param config should be.

but then if I got the list of disabled cops, how to figure out which ones have 0 violations?

if you're wondering why I'm asking: we're adding rubocop to a giant (~400k loc) repo and I want to try to enable the ones that have 0 violations first in one go, and then address the other ones one by one. And currently, for reasons outside of my control, rubocop is configured to have all cops disabled by default, and then we have to enable them one by one. So I can't just enable everything and generate ad .todo file for the ones that do have a violation.

Thanks!