| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [verb] to the [adj] | 240 |
|
| 2 | difficulty [prep] [verb] [prep] the [adj] | 24 |
|
| 3 | difficulty [prep] [verb] to [art] [adj] | 9 |
|
| 4 | difficulty [prep] [verb] to [art] [adj] | 9 |
|
| 5 | difficulty [prep] [verb] to the [adj] | 7 |
|
