YOU SAID:
I did my waiting, twelve years of it, in Azkaban.
INTO JAPANESE
アズカバンで私は12年も待っていました。
BACK INTO ENGLISH
I have been waiting for 12 years in Azkaban.
INTO JAPANESE
私はAzkabanで12年間待っています。
BACK INTO ENGLISH
I have been waiting for Azkaban for 12 years.
INTO JAPANESE
私はアズカバンを12年間待っていた。
BACK INTO ENGLISH
I have been waiting for Azkaban for 12 years.
That didn't even make that much sense in English.