| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | while working [prep] | 115 |
|
| 2 | while working [prep] | 115 |
|
| 3 | while [verb] at | 112 |
|
| 4 | while [v-ing] at | 100 |
|
| 5 | [conj] working at | 42 |
|
| 6 | while work at | 17 |
|
| 7 | while working at | 17 |
|
