| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at the time | 1400 |
|
| 2 | [verb] [v-ing] at the | 391 |
|
| 3 | [v-ing] at the time | 192 |
|
| 4 | [verb] [v-ing] the time | 12 |
|
