Division, Segment
noun, verbal noun, の adjective
Take a district and divide it and you'll end up with many smaller divisions and segments. 区分 is a formal term that refers to dividing or segmenting things into sections or categories based on specific criteria. For example, 区分 might be used when dividing an area into different zones or segments like residential and commercial, or sorting documents into different categories based on their content.
くぶん
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.
この町では、校区が三区分に分けられています。
In this town, the school district is divided into three divisions.
これは予算区分の問題なので、私にはどうしようもありません。
This is a problem of budget classification, so there's nothing I can do.
そういえば、マヤ文明の時代区分って、どうなっているんですか？
By the way, how is the Mayan civilization's periodization structured?