From what I could see, big retailers have a lot of "evergreen" openings which makes sense as they can have multiple locations and there is a lot of churn. And there are obvious outlier sub-categories like warehouse workers etc which have median times <7d, I didn't break it down in the blog as it's too much data to present. But other than that, I don't have enough search data to draw meaningful conclusions. (say around supply/demand)