| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [vb pp] a long [noun] | 501 |
|
| 2 | [verb] a long period | 34 |
|
| 3 | [vb pp] a [adj] period | 25 |
|
| 4 | [vb pp] [art] long period | 10 |
|
| 5 | [vb pp] [art] long period | 10 |
|
| 6 | [vb pp] a long period | 9 |
|
