3 collocations for threefold

If the engine had to work up to three times its nominal power, as is now common in marine engines, I should either increase correspondingly the quantity of evaporating surface in the boiler, or adopt such an amount of expansion as would increase threefold the efficacy of the steam, or combine in a modified manner both of these arrangements.

If with the increase of revenue this estimate had been doubled in 1808, the material collected and the ships held back until the latter part of 1812, the country would have been supplied with twenty sail of the line, fifty frigates, and thirty sloops-of-war,a force which would have employed at least threefold its number of English ships, upon our coast, upon the passage, and in the dock-yards.

And you might remember that I have threefold the strength which emboldens your hunters to incur all the dangers that seem to your fancy so terrible.

3 collocations for  threefold