| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] [adv] [verb] [prep] the | 3786 |
|
| 2 | [adv] difficult [verb] [prep] the | 117 |
|
| 3 | [vb past] [adv] difficult [verb] [prep] | 15 |
|
| 4 | [vb past] [adv] difficult [prep] the | 9 |
|
