spacing

noun
1
the amount of space that is left between things, especially between the words or lines printed on a page
فاصله‌گذاری, فاصله‌بندی, تنظیم فاصله
2
the amount of time that is left between things happening
فاصله, فاصله‌گذاری, تنظیم فاصله‌
In music, the spacing of intervals is vital.