| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [det] [noun] time | 55 |
|
| 2 | [prep] a [det] year [noun] | 35 |
|
| 3 | [prep] a [adj] year time | 22 |
|
| 4 | [prep] [art] [det] year time | 20 |
|
