The study compared patients who took three hundred twenty-five milligrams of aspirin at least two times a week with those who did not use aspirin.

VOA: special.2009.09.01

But it's difficult, because you have to go there like four or five times a week.

但是要坚持学习真实太难了，你一周得去四、五次。

I used to实战 - SpeakingMax英语口语达人