This is the 2508th most frequent Japanese word.
単位
"単位" means "unit" or "credit" (e.g., in measurement or academic courses).
Here, '単位' refers to academic credits that are used to measure student achievements in schools or universities.
私はこの学期で三単位を取得しました。
I earned three credits this semester.
In this context, '単位' denotes a unit of measurement used in a physical or scientific context.
距離の単位にはさまざまな種類があります。
There are various types of units for measuring distance.
Here, '単位' represents a unit of time used to standardize measurements for operational analysis.