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| Subject | English | Russian |
| patents. | no more often than once a day | не чаще раза в день (Another amazing thing, on this regimen, I only felt the need to eat no more often than once a day, saving me much time preparing meals, helping my teeth and ... 'More) |
| patents. | no more than once a day | не чаще раза в день ('More) |
| med. | once a day | один раз в сутки (MichaelBurov) |
| med. | once a day | раз в день (Alex_Odeychuk) |
| med. | once a day | один раз в день (MichaelBurov) |
| Makarov. | once a day, month, year etc | раз в день, в месяц, в год и т. д |
| agric. | once-a-day feeding | одноразовое кормление |
| tech. | once-a-day milking | однократное доение |