| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] for a | 7555 |
|
| 2 | [adv] for a | 4132 |
|
| 3 | once [prep] a | 498 |
|
| 4 | once [prep] a | 498 |
|
| 5 | once for [art] | 21 |
|
| 6 | once for a | 7 |
|
| 7 | once for a | 7 |
|
