ShakespearesWords.com

benefit (n.)

agency, help, means

CE I.i.91	[Egeon to Duke, of the sun] by the benefit of his wished light / The seas waxed calm
Cym IV.ii.342.1	[Captain to Lucius, of the arrival of the new troops] With the next benefit o'th' wind [i.e. with the next advantageous wind]