DIRECT-COLLAPSE BACK HOLES. “Given that overdense regions make up only 0.01%–0.1% of the Universe, the global number density of DCBH formation is predicted to be 10(-7) –10(-6) Mpc(-3) (co-moving), 100–1,000 times higher than previous estimates.” (DCBH = direct-collapse black holes).
https://www.nature.com/articles/s41586-019-0873-4