2 years
They were in hiding for 2 years and about one month.
The expression secret annexe was created for the English translation of her diary.
they hide in Anne room?!
She wasn't hiding, she was in the kitchen.
Turtles are simple-minded creatures. Their favorite game is Hide and Seek, so when they hide they assume that you'll start playing Hide and Seek with them. It's best to just go along with it and...