A method, data processing unit, and system for monitoring excrement data for seeking a pattern for a monitoring period, wherein said excrement data is associated with at least one absorbent article and a person wearing said at least one absorbent article is disclosed. The method includes acquiring excrement data including excrement data for at least two different time periods, each substantially corresponding to the monitoring period for which a pattern of events is sought, wherein said excrement data includes information of excrement into an absorbent article in form of excrement events, and wherein each excrement event has an associated time mark or associated information from which an associated time mark may be derived； and smoothing the time mark of each excrement event.
