| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] in a [adj] | 3496 |
|
| 2 | [adv] once in a | 27 |
|
| 3 | once in a [adj] | 26 |
|
| 4 | [adv] once a [adj] | 8 |
|
