| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] at [art] time | 71 |
|
| 2 | [to-vb] at the time | 53 |
|
| 3 | [to-vb] at the time | 53 |
|
| 4 | [to-vb] at a time | 18 |
|
| 5 | [to-vb] at a time | 18 |
|
