| Subject | English | Russian |
| cliche. | it's a once-in-a-lifetime experience | такое бывает только раз в жизни (ART Vancouver) |
| idiom. | once in a lifetime experience | потрясающее зрелище (a once-in-a-lifetime experience as the vast herds move to... sankozh) |
| trav. | once in a lifetime experiences | открытия (This country is full of once in a lifetime experiences sankozh) |