Which preposition to use with boatload

of Occurrences 13%

"They're coming after us, Frank," said Jack, "a whole boatload of 'em.

from Occurrences 1%

'Duke Radford had heavy shipments in this vessel, and for a few days Katherine left the outside customers to their own devices, spending busy hours in checking invoices and helping to stow away the merchandise which Stee Jenkin and Miles brought up river in boatloads from the steamer.

Which preposition to use with  boatload