| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [art] [num ord] time of ask | 7 |
|
| 2 | at [art] [num ord] time of asking | 7 |
|
| 3 | at [art] [num ord] time of [verb] | 7 |
|
| 4 | at [art] [num ord] time of [v-ing] | 7 |
|
