postp（1）

他の時間の尺度と組み合わせて使い、期間の長さを強調するための後置詞

English Meaning

used in combination with another measure of time to put emphasis on the duration

Am trăit douăzeci de zile în acel oraș.

私はその街に20日間住んでいました。

I lived in that city for twenty days.