| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | while [v-ing] at | 100 |
|
| 2 | while working at | 17 |
|
| 3 | while work at | 17 |
|
| 4 | while [vb pp] at | 12 |
|
| 5 | while looking at | 10 |
|
| 6 | while look at | 10 |
|
| 7 | while stay at | 7 |
|
| 8 | while staying at | 7 |
|
| 9 | while sitting at | 5 |
|
| 10 | while studying at | 5 |
|
| 11 | while sit at | 5 |
|
| 12 | while study at | 5 |
|
