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Dear teachers ,

Please kindly correct if the adverbial phrases of time in bold type are not correct.

Mr Brown currently works as an electrical engineer for a factory in the daytime/ during the daytime/ in the day/during the day /by day and works as a teacher of Japanese in the nighttime/during the night time /at night /in the night / by night .

Thank in advance
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TuongvanDear teachers ,

Please kindly correct if the adverbial phrases of time in bold type are not correct.

Mr Brown currently works as an electrical engineer for a factory in the daytime/ during the daytime/ in the day/during the day /by day and works as a teacher of Japanese in the nighttime/during the night time /at night /in the night / by night .

Thank in advance

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Feebs11
TuongvanDear teachers ,

Please kindly correct if the adverbial phrases of time in bold type are not correct.

Mr Brown currently works as an electrical engineer for a factory in the daytime/ during the daytime/ in the day/during the day /by day and works as a teacher of Japanese in the nighttime/during the night time /at night /in the night / by night .

Thank in advance

"Daytime" sounds odd to me. "In the day" sounds somewhat unnatural to me as well. Otherwise, I would agree with Feebs.