| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [v-ing] [prep] a | 4344 |
|
| 2 | [prep] [v-ing] [prep] a | 4344 |
|
| 3 | [prep] [v-ing] for [art] | 1408 |
|
| 4 | [prep] [verb] for a | 609 |
|
| 5 | [prep] [v-ing] for a | 598 |
|
| 6 | [prep] [v-ing] for a | 598 |
|
