| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | root of the trouble | 7 |
|
| 2 | root [prep] the trouble | 7 |
|
| 3 | root [prep] the trouble | 7 |
|
| 4 | root of the trouble | 7 |
|
| 5 | root [prep] the trouble | 7 |
|
