| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] a [noun] | 18510 |
|
| 2 | [v-ing] [prep] a [noun] | 18507 |
|
| 3 | [v-ing] at [art] [noun] | 6393 |
|
| 4 | [verb] at a [noun] | 4420 |
|
| 5 | [v-ing] at a [noun] | 958 |
|
