| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] at the time [prep] | 8 |
|
| 2 | [prep] [v-ing] at [art] time [prep] | 8 |
|
| 3 | [prep] [v-ing] at [art] time [prep] | 8 |
|
| 4 | [prep] [v-ing] at [art] time of | 7 |
|
| 5 | [prep] [v-ing] at [art] time of | 7 |
|
