| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [art] tough | 30 |
|
| 2 | for a tough | 20 |
|
| 3 | for a tough | 20 |
|
| 4 | for the tough | 10 |
|
| 5 | for the tough | 10 |
|
