Q:

What word or short phrase could be used to describe 'sharing an activity, task, job or burden to lighten to load'?

I specifically need it to be neutral or positive in tone.

A:

I don't have a single word, but there is a well-known idiom:

Many hands make light work: A large task does not seem as daunting when it is shared among multiple people.

Here, the "hands" represent the people's hands who help to perform the work, similar to "lend a helping hand," and the "light" work refers either to weight or intensity.

