noun
speed; rate of progress
Refers to the pace or speed at which something proceeds, often with a nuance of whether it is fast or slow. Somewhat formal or literary; in everyday speech 速さ or スピード are more common.
工事の遅速がプロジェクト全体に影響する。
The speed of the construction affects the entire project.
改革の遅速は国民の関心事だ。
The pace of reform is a matter of public concern.