| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the time of [v-ing] to | 67 |
|
| 2 | at the time [prep] [v-ing] to | 67 |
|
| 3 | at the time of [v-ing] to | 67 |
|
| 4 | at the time [prep] going to | 64 |
|
