| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [prep] a long [noun] | 184 |
|
| 2 | [adj] [prep] a [adj] period | 63 |
|
| 3 | [adj] [prep] a long period | 17 |
|
| 4 | [adj] [prep] [art] long period | 16 |
|
| 5 | [adj] [prep] [art] long period | 16 |
|
| 6 | [adj] [prep] a long period | 14 |
|
| 7 | [adj] [prep] a long period | 14 |
|
