| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at that time | 334 |
|
| 2 | [conj] at that time | 186 |
|
| 3 | [conj] [verb] at that | 56 |
|
| 4 | [conj] [verb] at time | 18 |
|
