Double-handedly

Dinghies are designed to be sailed single-handedly or double-handedly, but some larger cruising dinghies may have room for four or more people on board.

Source: wiktionary

Working double-handedly also conserves your hands in large kneading strokes, for example when you are working on the adductors on the inside of the thigh.

Source: wiktionary

I said I was writing my memoirs, a choppy musical dedicated to counterpoint, without the axes of time and place, collapsing in upon itself because the notes will inevitably run out, returning, elaborating, crisscrossing, double-handedly creating variations upon a theme.

Source: wiktionary

The combination of discontent and economic collapse brought about the revolution. It did not do so simply double-handedly.

Source: wiktionary