| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] at a [adj] [noun] | 448 |
|
| 2 | [adv] at [art] [adj] time | 318 |
|
| 3 | [adv] [prep] a [adj] time | 212 |
|
| 4 | [adv] [prep] a [adj] time | 212 |
|
| 5 | [adv] at a [adj] time | 36 |
|
| 6 | [adv] at a [adj] time | 15 |
|
