| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb infin] a [adj] time | 320 |
|
| 2 | [verb] a tough time | 38 |
|
| 3 | [vb infin] a tough [noun sg] | 28 |
|
| 4 | [vb infin] a tough [noun] | 28 |
|
| 5 | [vb infin] [art] tough time | 8 |
|
| 6 | [vb infin] a tough time | 8 |
|
