twice a week 【希望帮助到你，若有疑问，可以追问~~~祝你学习进步，更上一层楼！(*^__^*)】
once a week twice a week three times a week four times a week once a mouth up to three times a mouth most of students none of students three or four times a week
一周两次或者三次：twiceorthirdtimesaweek
twice a week希望能帮到你，祝更上一层楼O(∩_∩)O有不明白的请继续追问(*^__^*)
twiceorthreetimesaweek
twiceaweek一周2次threetimesaweek一周3次
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