Spacing refers to the way that typing or printing is arranged on a page, especially in relation to the amount of space that is left between words or lines.
例句
Please type or write clearly in double spacing on one side of A4 paper only.請用A4紙、以雙倍行距單面打印或謄抄，字跡務必清晰。
英英詞典釋義
Noun
1. the time between occurrences of a repeating event;
"some women do not control the spacing of their children"
2. the property possessed by an array of things that have space between them