| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | difficulty [prep] [v-ing] the [adj] [noun pl] | 35 |
|
| 2 | difficulty [prep] [verb] the [adj] [noun pl] | 35 |
|
| 3 | difficulty [prep] [verb] the [adj] [noun pl] | 28 |
|
| 4 | difficulty [prep] [verb] the [adj] [noun pl] | 26 |
|
| 5 | difficulty in [verb] the [adj] [noun pl] | 24 |
|
| 6 | difficulty in [verb] the [adj] [noun pl] | 24 |
|
| 7 | difficulty of [verb] the [adj] [noun pl] | 9 |
|
| 8 | difficulty of [verb] the [adj] [noun pl] | 9 |
|
| 9 | difficulties [prep] [verb] the [adj] [noun pl] | 9 |
|
| 10 | difficulty [prep] [verb] the [num] [noun pl] | 5 |
|
