| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [pers pn] [prep] a time | 7 |
|
| 2 | [to-vb] [pers pn] [prep] a time | 7 |
|
| 3 | [to-vb] [pers pn] at a time | 5 |
|
| 4 | [to-vb] [pers pn] at a time | 5 |
|
