| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [pers pn] [prep] a | 22428 |
|
| 2 | once [prep] a | 498 |
|
| 3 | [pers pn] once [prep] | 68 |
|
| 4 | [pers pn] once a | 54 |
|
