To go shares

to partake; to be equally concerned.

See also: Share

References in classic literature ?
A cat had made acquaintance with a mouse, and had spoken so much of the great love and friendship she felt for her, that at last the Mouse consented to live in the same house with her, and to go shares in the housekeeping.
This however he could get over by arranging with a Tagarin Moor to go shares with him in the purchase of the vessel, and in the profit on the cargo; and under cover of this he could become master of the vessel, in which case he looked upon all the rest as accomplished.
He was ordered to walk to keep off the gout, and Mrs Croft seemed to go shares with him in everything, and to walk for her life to do him good.