| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] time | 9258 |
|
| 2 | a [adj] time | 7531 |
|
| 3 | a certain [noun] | 4627 |
|
| 4 | a certain time | 106 |
|
| 5 | [art] certain time | 106 |
|
