And what year did the historic divide of Shia and Sonny take place

The historic divide between Shia and Sunni Muslims took place in the 7th century, after the death of the Prophet Muhammad in 632 AD. The split occurred over a disagreement about who should lead the Muslim community after the Prophet's death, with Shia Muslims believing that leadership should stay within the Prophet's family, and Sunni Muslims believing that leadership should be elected from among the community.