| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [v-ing] [prep] a | 27362 |
|
| 2 | in [v-ing] [prep] | 4417 |
|
| 3 | in [v-ing] a | 2489 |
|
| 4 | in [prep] a | 93 |
|
