I brush my teeth twice a day!

我每天刷两次牙！

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Normally he performs his devotions twice a day.

通常他每天进行两次祈祷。

《柯林斯英汉双解大词典》

I phoned twice a day, leaving messages with his wife.

我一天打了两次电话，留言给他妻子。

《柯林斯英汉双解大词典》

And I'm holding meetings twice a day with the engineers and pushing them to move faster and come up with better quality search services.

类似的会议一天两次,督促他们加快开发进度，开发出更高质量的搜索引擎。

斯坦福公开课 - 百度CEO李彦宏演讲：全球最大搜索引擎的发展课程节选

We practice once or twice a day,

我们一天训练一到两次，

斯坦福的赛艇队 - SpeakingMax英语口语达人

In particular, the daily burnt offerings sacrificed by the priests twice each day, and emitting this pleasing odor: these were an effort to attract the deity.

尤其是每天两次的烧祭品,散发出美妙的气味：,这些都是为了吸引神灵的注意。

耶鲁公开课 - 旧约导论课程节选

Merck has portrayed its drug as a true one-a-day, while Celebrex is taken once or twice a day.

FORBES: Ready For Battle

Cholesterol concentrations were approximately 5% lower in men and women who ate six or more times a day compared with those who ate once or twice a day.

BBC: 'Little and often' cuts cholesterol

Therapy, starting the day after surgery, would increase from once to twice a day, including weekends.

NEWYORKER: Big Med