| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have difficulty | 771 |
|
| 2 | have difficulty | 210 |
|
| 3 | had difficulty | 207 |
|
| 4 | have difficulty | 159 |
|
| 5 | having difficulty | 149 |
|
| 6 | have difficulties | 124 |
|
| 7 | has difficulty | 73 |
|
| 8 | had difficulty | 58 |
|
| 9 | to have difficulty | 39 |
|
