DIVISION
break something down (into something)
to divide something into smaller parts; to divide something into its component parts.Please break this paragraph down into sentences.The chemist broke down the compound into a number of elements.Walter broke the project down into five tasks and assigned them to various people.
divide and conquer
to cause the enemy to divide and separate into two or more warring factions, and then move in to conquer all of them. (Fixed order.)Mary thought she could divide and conquer the board of directors, but they had survived such tactics many times, and her efforts failed.Sam led his men to divide and conquer the enemy platoon, and his strategy succeeded
separate the sheep from the goats
to divide people into two groups.Working in a place like this really separates the sheep from the goats.We can't go on with the game until we separate the sheep from the goats. Let's see who can jump the farthest.