| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have a tough time | 30 |
|
| 2 | having [art] tough time | 11 |
|
| 3 | had [art] tough time | 7 |
|
| 4 | have [art] tough time | 6 |
|
| 5 | had [art] tough time | 5 |
|
