It was in four parts. Two parts were essentially the same, marriage certificate and marriage bona fides. That is slightly tricky because Sweden doesn't have marriage certificates as such and I explained that and included everything that the Swedish authorities provide for this purpose.
Another thing asked was the last 3 pages of the I-130f, which I didn't include because they were blank. I didn't use a preparer or interpreter. So I simply uploaded those blank pages.
The last thing was proof of divorce for (my) previous marriage, which I uploaded.
I thought I had included some of this stuff in the original application, physical paper, but it was so long ago that it's hazy at this point. Anyway I included several things for marriage bona fides, including a consular report of birth abroad for our daughter that I obtained after having sent the visa application.
Perhaps because it's so many things this would take time, or not? Frankly, I think anyone looking at what I uploaded would see pretty quickly that it's all legitimate. I have been living with my wife abroad for 2 years, we have a daughter, etc. But maybe that's not how USCIS sees it.