| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [verb] [prep] the [adj] | 2968 |
|
| 2 | difficulty [prep] [verb] the [adj] | 118 |
|
| 3 | difficulty [prep] [verb] [prep] [adj] | 61 |
|
| 4 | difficulty [prep] [verb] [prep] the | 60 |
|
| 5 | difficulty [verb] [prep] the [adj] | 28 |
|
