虽然在这个示例中只出现了一次，但为了分级目的，您应该确定这些任务在主要班次期间的运行频率。
While this is a single occurrence in this sample, for sizing purposes, you should determine how often these tasks run during prime shift.
从语言难易度、使用频率等角度进行分级、排序，能够达到相对合理的程度；
This paper holds that comparatively rational grade and sequence can be obtained by taking into consideration of difficulty levels and usage frequency count of grammar items.
本文以重庆市为例，对九大城区各种地质灾害进行分级评价，根据本地区实际情况，得到灾害发生的频率和严重度，从而计算出灾害指数。
This paper assesses grades of different geologic hazards in Chongqing. According to practical situation, the hazard index can be calculated through hazard frequency and hazard severity.
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