| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [adv] [prep] a | 4354 |
|
| 2 | [v-ing] on [prep] a | 242 |
|
| 3 | [adv] on [prep] a | 175 |
|
| 4 | [v-ing] [adv] on [prep] | 173 |
|
