| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a time [prep] | 315 |
|
| 2 | [noun] [vb past] [prep] a time | 50 |
|
| 3 | [vb past] [prep] a time [prep] | 47 |
|
| 4 | [noun] [vb past] [prep] time [prep] | 41 |
|
