A hole in a spreadsheet is not a queue of customers waiting to be served.
Cost guides are the best-performing page type on a site I run. Position one within nine days of publishing, three separate times. So when the map showed cost pages for two towns and nothing for the five others that already had every other page type, the move was obvious. Build the five. Same template, same afternoon, done before lunch.
I did not build them.
Here is the part that gets skipped.
A gap in a grid is a wonderfully persuasive thing. It looks like an oversight somebody forgot to tidy, and tidying it feels like work. But symmetry is not demand. Those two towns may have cost pages because people in those towns actually search for the cost, not because the other five were overlooked in some ancient sprint. The grid has no idea which of those it is. For an afternoon, neither did I.
So the five went into the plan as unvalidated, and the plan says what has to happen before a word gets written. Pull the real search data per town, and read the day-by-day breakdown rather than the monthly total, because one freak Tuesday flattens into a very respectable-looking average. Bin anything running at a few impressions a week. Then build one town, measure it for a fortnight against that nine-day precedent, and only then decide about the other four.
Publishing all five at once would feel productive and destroy the only thing worth having, which is the ability to tell whether the page type still works.
A missing row is not a market. It is a missing row, and the quickest way to build five pages nobody wanted is to let a tidy grid do your thinking for you.