| Subject | English | Russian |
| gen. | a fraction of a second | доля секунды |
| gen. | a fraction of a second before | доля секунды отделяет (A fraction of a second before this FA-18 hits the ground, the pilot escapes unharmed thanks to his ejection seat. Perfectly Timed Military Photos Oleksandr Spirin) |
| gen. | for a fraction of a second | на долю секунды (clck.ru dimock) |
| mil. | fraction of a second | доля секунды |
| gen. | fraction of a second | доля секунды (I spent a fraction of a second weighing up the odds.) |
| Makarov. | in a fraction of a second | за долю секунды |
| gen. | in a fraction of a second | вмиг (highanger) |