You should poop at least once per day under normal circumstances.

正常情况下，你每天至少应该大便一次。

youdao

Over a 30 day period, he pledges to train at least once per day, and 45 times in all.

他保证在30天内，他每天都要训练一次其中的一项，每项总共训练45次。

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Most people, at least once per day, will lose concentration on not biting their nails.

大多数人一天中至少一次会无意识地咬指甲。

youdao

Pew also found that 53 percent of Americans who use their phones to go online do so at least once per day.

CNN: Survey: U.S. mobile Web access growing fast

For example, 42% of female online gamers socialize with friends and family in person at least once per day versus 31% of females who do not play online games.

FORBES: Connect

Consequently, one in two respondents reported leaving the office on coffee or snack runs at least once a day, with some making as many as five trips per day.

FORBES: Lack of Snack Leads To Declined Productivity