| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] [v-ing] at the | 469 |
|
| 2 | [conj] at the time | 416 |
|
| 3 | [v-ing] at the time | 192 |
|
| 4 | [conj] [v-ing] the time | 22 |
|
