Per day
Example: She drinks coffee twice per day
Definition
"Per day" is a prepositional phrase used to indicate the frequency or rate at which something occurs within the span of one day. For example, in the phrase 'She drinks coffee twice per day,' it specifies how often an action happens daily.
Etymology
The phrase "per day" comes from the Latin word 'per,' meaning 'through' or 'by means of,' combined with the Old English 'dæg,' meaning 'day.' Over time, "per day" became a common way to express daily frequency or rate in English.
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"Per day" appears in the Vocaplus list "English - General - (A1) - set 1", containing 103 commonly used words.
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