Bulk updating post dates 7 days apart

More of a question, is the plugin distributing the posts evenly between the time period you select on the “Distribute into Last” selector?

I’ve got a bunch of posts on my site which I’d like to update post dates to 1 week apart, so the past posts that have been posted all on the same day are spaced out 1 week apart. Would it be possible to achieve this if I took the total count of blog posts and calculated the number of weeks back and set a custom date range? Would the plugin divide the post dates by weeks? Say if I had 875 posts and I used the custom selector to select a time frame of 125 weeks, would it then post them 7 days apart? (As 875/7 is 125 weeks).