| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] a tough time | 36 |
|
| 2 | have a tough time | 30 |
|
| 3 | [v-ing] a tough time | 12 |
|
| 4 | having a tough time | 11 |
|
| 5 | [vb past] a tough time | 8 |
|
| 6 | [vb infin] a tough time | 7 |
|
| 7 | had a tough time | 7 |
|
| 8 | have a tough time | 6 |
|
| 9 | [vb pp] a tough time | 6 |
|
| 10 | had a tough time | 5 |
|
