英语翻译不是物理上的"频率",例如:汽车每15分钟一班,是Frequency:15min 还是Period:15min

翻译成“频次分布”
每15分钟可以翻译成 every 15 mins.
如果要指定个名词,那应该是Interval.
The interval for the buses is 15 mins.
或者
The duration between every two buses is 15 mins.