Complex sentence: In more recent times this has been held almost every year, but "officially" is held every two or three years in late January or early February, and is called at the discretion of the North Slope Borough Mayor.
Split into simpler sentences: In more recent times this has been held almost every year, but "officially" is held every two or three years in late January or early February. It is called at the discretion of the North Slope Borough Mayor.