YOU SAID:

I had asked twelve times for my great sister to relate.

INTO JAPANESE

私は姉に話してくれるように 12 回尋ねました。

BACK INTO ENGLISH

I asked my sister 12 times to tell her.

INTO JAPANESE

私は妹に12回言ってもらいました。

BACK INTO ENGLISH

I had my sister say it 12 times.

INTO JAPANESE

妹に12回言わせました。

BACK INTO ENGLISH

I made my sister say it 12 times.

INTO JAPANESE

妹に12回言わせました。

BACK INTO ENGLISH

I made my sister say it 12 times.