"Slow pacing" refers to the speed or tempo at which something is happening, which is relatively slow. It means that things are progressing or unfolding at a relaxed and unhurried rate, taking more time than usual. Full definition
I could have done without maybe the last 25 minutes of it, but I actually like the deliberate kind of slow pacing of say the first hour, hour and half. (ebertpresents.com)
We need an offensive program, aimed not just at slowing the pace of destruction, but at creating a sustainable society. (grist.org)
And I think you're going to be moving at a slightly slower pace in a good way. (psychologyofeating.com)