| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] a [adj] time | 583 |
|
| 2 | [vb past] a [adj] time | 526 |
|
| 3 | [vb past] a difficult [noun] | 51 |
|
| 4 | [vb past] a difficult [noun sg] | 49 |
|
| 5 | [verb] a difficult time | 22 |
|
| 6 | [vb past] a difficult time | 10 |
|
| 7 | [vb past] [art] difficult time | 10 |
|
| 8 | [vb past] a difficult time | 10 |
|
