YOU SAID:

the longest i have been away from my 16 children is 2 weeks.

INTO JAPANESE

私が16人の子供から離れた最長期間は2週間です。

BACK INTO ENGLISH

The longest time I have been away from 16 children is 2 weeks.

INTO JAPANESE

私が16人の子供から離れた最長時間は2週間です。

BACK INTO ENGLISH

The longest time I have been away from 16 children is 2 weeks.