margin

MARGIN noun

[ C ] uk/ˈmɑːdʒɪn/ us margin noun [C]
(SPACE)

an empty space down the side of a page of writing

поле (страницы)
You can make notes in the margin . a margin of error
the amount by which a calculation can be wrong but still produce a good result

пределы погрешности
a margin of error of 5 percent
margin noun [C]