| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | once [prep] a | 498 |
|
| 2 | [adv] during a | 182 |
|
| 3 | [adv] during a | 115 |
|
| 4 | once during [art] | 33 |
|
| 5 | once during a | 5 |
|
