| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | them at a [noun] when | 5 |
|
| 2 | them at a [noun sg] [Wh adv] | 5 |
|
| 3 | them at a time [Wh adv] | 5 |
|
| 4 | them at a time [Wh adv] | 5 |
|
