ruljangs

Etymology
Borrowed from older, from. Originally in the sense of circulation of money in.

Noun

 * 1)   ongoing (usually commercial, but also more general) operations (often involving circulation in some sense, for example of customers or goods); running, operations, business, commerce, etc.
 * 2)  circulation (of people, in certain positions or the like); turnover
 * 1)  circulation (of people, in certain positions or the like); turnover
 * 1)  circulation (of people, in certain positions or the like); turnover

Usage notes
"Roll" might provide intuition. Likely intuitively connected to by many native speakers as well (in addition to being etymologically connected).