| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] [prep] [v-ing] a | 1022 |
|
| 2 | [prep] [v-ing] at a | 192 |
|
| 3 | [adv] [prep] [v-ing] at | 186 |
|
| 4 | [adv] [v-ing] at a | 82 |
|
