| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [det] a long [noun] | 215 |
|
| 2 | [det] a [adj] period | 33 |
|
| 3 | [det] a long period | 13 |
|
| 4 | [det] [art] long period | 13 |
|
| 5 | [adj] a long period | 13 |
|
| 6 | [det] [art] long period | 13 |
|
