length

noun [抽象名词]长，长度；（持续）时间的长短；（书或文件等的）篇幅，（电影的）片长；（游泳池的）池长；（马或船的）自身长度；（行动的）程度；细长的一段（根，条）；（头发、衣服等）到身体某部位的长度；手中牌长（多指五张以上某同花牌）；（板球）球距；（元音或音节的）节奏音长

The length of something such as a piece of writing is the amount of writing that is contained in it.
篇幅