Why the two superlative queries returned nothing

What was returned

Nothing. The instrument returned an empty set of positions for both best seo company dublin and best seo agency dublin, while returning full pages for the four category queries read on the same date with the same method.

What a null reading is

An absence of data in the instrument, not an absence in the world. Keyword tools hold stored results pages for the queries they have crawled, and coverage thins on lower-volume and less commercially crawled terms. Best seo agency dublin draws around 20 searches a month in Ireland, which is the sort of volume where thin coverage is unsurprising. Best seo company dublin draws around 200, which is less obviously explained.

What it is not evidence of

Not that nobody searches them. Demand for both was measured separately from the same tool's keyword data, and both return figures.

Not that the results page is empty. Somebody searching either phrase in Ireland gets results. This log simply has no record of what they are.

Not a position, good or bad, for anyone. No page in this network may cite these null readings as though they said something about who ranks. They say something about the instrument.

Why they stay in the set

Because the watch set is add-only, and because the network makes its central claim in exactly these words. A query the network's own claim depends on belongs in the watch set whether or not the instrument can currently read it, and a null recorded every four weeks is itself a record: if data appears later, the date it appeared is known.

What would fix it

A second instrument, or a manual reading taken in a clean browser and recorded by hand with the reader's location stated. Both are possible and neither has been done. When one is, it starts a separate series under the protocol's rule that a change of instrument begins a new series rather than continuing this one.