To paraphrase Neil Gaiman: “Events are cowards. They don’t occur singly, but instead they run in packs and leap out at you all at once.”
I’ve noticed this tendency. There will be stretches of empty followed by three or four things needing my attention at once. This pattern holds true within a single day, or within a week, month, or year. When I read that quote, I just about laughed out loud. Then I had to come and put it here so I can find it again.