Use it twice
两次───twice;用───use
I go swimming twice a week.───我每星期游泳两次。
The villa is cleaned twice a week.───这栋别墅一周打扫两次。
She's backpedalled twice already.───她已经两次改变主意了。
But as long and difficult as the process became, it was always twice as much fun and definitely worth our while.───但是，尽管这付出的过程是如此漫长且艰辛，不过回报总是有双倍的快乐，这一切都是值得的！
A mathematician said the chance for same six numbers coming up twice in a row was one in four million, but he said coincidences do happen.───一位数学家表示，开出同样的六位数号码的几率为四百万分之一，但是他说，确实有可能出现巧合。
In addition, strength training exercises are recommended at least twice a week.───此外，每周最好进行两次以上的力量训练的练习。
I play tennis twice a week.
Millions follow this hospital drama twice a week.
They used to visit her grave twice a year.
Opportunity never knocks twice at any man's door.
Think twice before you do it.