| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] while at | 148 |
|
| 2 | [noun sg] while at | 93 |
|
| 3 | [noun pl] while at | 35 |
|
| 4 | [noun prp] while at | 12 |
|
| 5 | [n mass] while at | 8 |
|
