Which preposition to use with sixteens

in Occurrences 2%

Dorothy Faust (W); 8Apr58; R212743. Sixteen in Nome, by Max Brand, pseud.

of Occurrences 1%

"Sixteen of the Tuberos, with their wives and children, lived in a small house."Ib.

to Occurrences 1%

"According to the account of the pirate, there could not have been much less than thirty thousand dollars, and nearly all of it in good doubloons of the coin of the kingsdoubloons that will weigh their full sixteens to the pounday, and to spare!"

Which preposition to use with  sixteens