1. A method for controlling acquisition of an occurred event that occurs in a network system due to the network system executing processing as requested by a request apparatus configured to request execution of the processing via a network, wherein the network system notifies an acquisition apparatus via the network about the occurred event, and wherein the acquisition apparatus is configured to acquire the occurred event, the method comprising: determining whether the request apparatus is in process of inputting a request to execute the processing from start of input until finalization of the input; and setting, if it is determined that the request apparatus is in process of inputting the request to execute the processing, a set interval for the acquisition apparatus to acquire the occurred event by executing processing to determine that the request apparatus is in process of inputting the request to execute the processing, wherein the set interval is shorter than an interval that is set if it is determined that the request apparatus is not in process of inputting the request to execute the processing.