| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb past] a [adj] time | 620 |
|
| 2 | at a [adj] time | 433 |
|
| 3 | [vb past] at a [adj] | 411 |
|
| 4 | [vb past] at [adj] time | 221 |
|
| 5 | [vb past] at a time | 63 |
|
