Another idea I need to examine (as I haven’t seen the numbers that I need) is how the “dips” (lower energy frequency than in the surrounding background) in both intensity, area (as compared in a ratio of dips vs. "standard) of the sky, and so forth compare with the percentages of dark matter in the Universe.
I have an autistic intuition that there is a numerical relationship between the irregularity of the cosmic background radiation and the amount (and distribution) of dark matter . . . although I’m having trouble articulating it.
I’ll get back to you.