| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] in a | 10281 |
|
| 2 | [adv] in a | 6072 |
|
| 3 | once [prep] a | 498 |
|
| 4 | once in [art] | 437 |
|
| 5 | once in a | 205 |
|
