| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at the time of [art] | 1187 |
|
| 2 | at the time of [v-ing] | 278 |
|
| 3 | the time of [v-ing] [art] | 80 |
|
| 4 | at the time [v-ing] [art] | 5 |
|
