Benchmark #7 (Single-source / Industry-consensus): Onely / Tomek Rudzki — ~16% of valuable indexable pages never indexed; 83% indexed within first week (some up to 8 weeks); ~56% after 1 day, ~87% after 2 weeks ("thousands of websites" — exact N undisclosed)

Claim: Onely (Tomek Rudzki), ~2021–2023, multiple cited figures:

• ~16% of valuable, indexable pages on popular sites are never indexed. Ever. (Verbatim Rudzki, with examples: Walmart.com — 45% of product pages not indexed; dictionary.cambridge.org — 99.5% not indexed.) See Onely (Tomek Rudzki) — "on average, 83% of pages are indexed within the first week of publication; some pages have to wait up to eight weeks"; ~16% of valuable, indexable pages on popular sites NEVER get indexed — flag survivorship for the lifecycle-brief atomic entry on this number.
• 83% of pages indexed within the first week of publication; some pages have to wait up to 8 weeks.
• Onely's indexing guide also reports ~56% of indexable URLs indexed after one day and ~87% after two weeks.

Source: Onely / Tomek Rudzki (industry analysis); 83%-in-week-one figure cited via Search Engine Journal Sept 27, 2022.

Method: "Thousands of websites" / "many popular websites" — exact sample size NOT publicly disclosed; URL Inspection API + sitemap sampling.

Distribution or average? Mix of average and distribution.

Confidence: Single-source / Industry-consensus.

Caveat: Product-incentivized (technical-SEO agency selling indexing services). Methodology and N are not transparent — the 83% figure is a secondary citation with no published N or method. The 16%-never-indexed number is the strategically important one and the corrective to the 83% survivorship-flagged figure.