YOU SAID:

That's at least 25 nights waited.

INTO JAPANESE

それは少なくとも 25 の夜を待ったです。

BACK INTO ENGLISH

It is at least waited for 25 nights.

INTO JAPANESE

それは少なくとも 25 泊を待っていた。

BACK INTO ENGLISH

It was waiting for at least 25 days.

INTO JAPANESE

それは少なくとも 25 日間待っていた。

BACK INTO ENGLISH

It was waiting for at least 25 days.