| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | to the trouble of [v-ing] a | 9 |
|
| 2 | [prep] the trouble of [v-ing] a | 9 |
|
| 3 | to the trouble of [v-ing] a | 9 |
|
| 4 | [prep] the trouble of [v-ing] a | 8 |
|
