| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [to-vb] [noun] at [art] time | 13 |
|
| 2 | [to-vb] [noun] at a time | 9 |
|
| 3 | [to-vb] [noun] at a time | 9 |
|
| 4 | [to-vb] [noun sg] at [art] time | 8 |
|
