No. 658 in Japanese
週間
"Week" or "weeks" (duration).
In a sentence
私は毎週一回のピアノのレッスンを六週間受けました。
I took weekly piano lessons for six weeks.
In this sentence, "週間" refers to the total duration of six weeks during which an activity occurred, quantifying a specific period.
このプロジェクトは二週間で完了する予定です。
This project is scheduled to be completed in two weeks.
Here, "週間" is used to specify a planned duration of two weeks for completing the project.
休暇のために三週間イタリアに滞在しました。
I stayed in Italy for three weeks on vacation.
In this example, "週間" denotes the length of the stay in weeks during a vacation.
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