Four times might be enough. Not once or twice.

四次才够，不只是一两次。

youdao

It was not once or twice it was a nightly event that went on for a few years.

这不是一次或两次，这是一个事件，每晚去住了数年。

youdao

Once or twice she wondered if he were not gradually falling into a doze.

有一两次，她怀疑他是不是渐渐打起瞌睡来了。

youdao

No, not once or twice a week that each user finds someone in the vicinity, once or twice a week among all users?

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If you've tried to remove the lens only once or twice and your eye is not irritated, it may be helpful to put rewetting drops in the eye and wait several minutes before trying to remove the lens again.

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President Obama has raised it once or twice, but knows it is not a vote winner and is keen not to antagonise coal miners further - especially in Ohio - with talk of carbon taxes or cap and trade and the like.

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