| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [vb past] at a [adj] | 154 |
|
| 2 | [noun] at a [adj] time | 139 |
|
| 3 | [noun] [vb past] a [adj] time | 133 |
|
| 4 | [noun] [vb past] at a time | 32 |
|
| 5 | [vb past] at a [adj] time | 11 |
|
