| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] a [noun] [prep] | 18046 |
|
| 2 | while [v-ing] [noun] [prep] | 247 |
|
| 3 | while [v-ing] a [noun] | 210 |
|
| 4 | while a [noun] [prep] | 192 |
|
