| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] [v-ing] at the | 51 |
|
| 2 | while [v-ing] at the | 36 |
|
| 3 | [vb pp] while [v-ing] the | 27 |
|
| 4 | [vb pp] while [v-ing] at | 11 |
|
| 5 | [vb pp] while at the | 6 |
|
