| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | have a tough | 74 |
|
| 2 | [vb past] a tough | 43 |
|
| 3 | [vb base] a tough | 34 |
|
| 4 | [vb -s] a tough | 31 |
|
| 5 | face a tough | 28 |
|
| 6 | [vb infin] a tough | 26 |
|
| 7 | [v-ing] a tough | 25 |
|
| 8 | [vb pp] a tough | 25 |
|
| 9 | had a tough | 21 |
|
| 10 | take a tough | 18 |
|
| 11 | [to-vb] a tough | 15 |
|
| 12 | have a tough | 13 |
|
| 13 | having a tough | 12 |
|
| 14 | faces a tough | 12 |
|
| 15 | have a tough | 11 |
|
| 16 | face a tough | 10 |
|
| 17 | had a tough | 8 |
|
| 18 | has a tough | 7 |
|
| 19 | need a tough | 5 |
|
