| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] at that time | 156 |
|
| 2 | [vb past] at that time | 73 |
|
| 3 | [vb past] [adv] at that | 58 |
|
| 4 | [vb past] [adv] that time | 12 |
|
