意外事故频率;
The traffic accident frequency making crime of causing a traffic accident happening gradually every year.
交通事故的频发使得交通肇事罪的发案率逐年上升.
The spring is the high-frequency time in one year, with higher accident frequency than Summer & Autumn.
一年四季中春季事故频次显著高于夏 、 秋两季, 为事故高发季节.
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