Is 東西二つ idiomatic?


I came across this sentence about a traditional festival in Japan:

> 阿月の神明祭は、阿月地区を東西二つに分けて行われる災厄除けや病気除け、豊作を祈願して行われる。

([link](http://www.pref.yamaguchi.lg.jp/cms/a50400/cul-pro/atsuki.html))

The general meaning is clear, but what I don't fully understand is this part:
`東西二つに分けて`

Its seems to me that `東西二つ` is idiomatic for "all over" (judging from what I
saw of a Google search of the phrase...I couldn't find a definition of them
together), but the I couldn't figure out what `に分けて` means in this context? I
know could mean "separated" (分かる, to separate), but apparently in the て-form
it can also mean "particularly" or "above all", which makes even less sense to
me..."particularly East and West?"




`阿月地区を東西二つに分けて` means "separate the Azuki district into two parts, east and
west".

You could insert a の, making it `東西の二つ`, but the adverbial use without it is
not uncommon for these "listing"-jukugo like `東西`, `優劣`, `大小` etc.




`阿月地区を東西二つに分けて` means "separate the Azuki district into two parts, east and
west".

You could insert a の, making it `東西の二つ`, but the adverbial use without it is
not uncommon for these "listing"-jukugo like `東西`, `優劣`, `大小` etc.

