MDStatisticFrequencyPeriod

Dissemination frequency of statistics. Special meaning for a value of zero which represents an event-driven dissemination in real time (e.g. as soon as a new trade occurs).统计数据传播频率。数值为零具有特殊含义，代表基于实时事件驱动的传播（例如，一旦发生新的交易即进行传播）。