| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [prep] [noun sg] | 5134 |
|
| 2 | at [v-ing] [prep] [noun] | 101 |
|
| 3 | at [verb] [prep] [noun sg] | 50 |
|
| 4 | at [v-ing] [prep] [noun sg] | 46 |
|
