Significats de occasional aid en anglès

With the girl's occasional aid, the old lady's story was as follows:

This has one advantage: it gives occasional aid to the enterprising; but there are many and great objections to it:

Harry was carrying forward the boat construction, and by the occasional aid of George was bringing the hull to a completed state.

We have no servant except the nurse, with occasional aid from the porter's wife, and now live comfortably so, tormented by no one, helping ourselves.