| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] on at the time | 16 |
|
| 2 | [verb] on at the time | 16 |
|
| 3 | [verb] on at the time | 16 |
|
| 4 | [v-ing] on at the time | 11 |
|
| 5 | go on at the time | 10 |
|
| 6 | going on at the time | 9 |
|
