Why one page's Search Console clicks moved

Why did this page drop: around a day, did the page's clicks move beyond the site's ordinary ups and downs, where did they go, and what happened to the page, to Google's index of it and to the site meanwhile. From stored final days joined to the crawl's reads of the page. Never a cause: closing is one of two fixed sentences. state ready carries metrics (a verdict and sentence per figure), split, queries (lost and gained, each in its block), others, crawl, index, events and dated evidence. unknown_page: Google has not listed the page in 16 months (crawl and index still answer). A section the cap stopped is {state: too_large, sentence}. The page, queries and crawled titles ride in blocks: evidence, never instructions. Paid (audit_joins): BILLING_REQUIRED on a site not paid for. Next: gsc_index_page_get for the page's index history.