'Fifty two' in the Bible

He was sixteen years old when he began to reign, and he reigned for fifty-two years in Jerusalem. His mother's name was Jecholiah, who was from Jerusalem.

Uzziah was sixteen years old when he began to reign, and he reigned for fifty-two years in Jerusalem. His mother's name was Jecholiah, who was from Jerusalem.

So the wall was completed on the twenty-fifth day of Elul, in just fifty-two days.