Which preposition to use with countless

as Occurrences 6%

He seemed buried in the opulence of the world, as he sat up to his waist in gold and jewels; all the earth's beauty gazed at him through eyes brilliant and countless as the stars of heaven; courtiers beckoned him to thrones; battle-steeds neighed and pawed for his mounting; laden tables allured every appetite; vassals bent in homage; slaves fell prostrate at his feet.

in Occurrences 3%

Birds countless in numbers and of infinite variety in plumage, sing out a welcome from every treetop.

of Occurrences 2%

And this is why I did not wish to cite instances from abroad, though I might have mentioned countless of them.

by Occurrences 1%

Forthwith I started to pursue the possible course of the fugitives, threading countless by-streets and alleys, peering into squalid courts and sending many a doubtful-looking loiterer shuffling hastily round the nearest corner.

Which preposition to use with  countless