Terms for subject International trade containing frequency

English	Chinese
frequency chart	频数图
frequency curve	次数曲线
frequency distribution	频数分布
frequency distribution	次数分配
frequency series	次数数列
ideal frequency distribution	理想次数分布
injury-frequency rates	事故伤害频率
minimum frequency	最低频率
normal frequency curve	常态次数曲线
overlapping of frequency curve	次数曲线的交叉
ultimate of frequency	极组频数