by a wide margin
By a large amount; by a lot. We won that game by a wide margin! I think the final score was 10-1.
on the margins of (something)
Existing at the periphery of a larger group, receiving less or little attention compared to the majority. The collective has been on the margins of the New York art scene for many years, but they are finally beginning to get some recognition from the mainstream. The laws rarely take into account those on the margins of society who are often the most vulnerable or in need of assistance.