| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun] [prep] a long | 362 |
|
| 2 | [adj] [noun] [prep] a period | 255 |
|
| 3 | [noun] [prep] a long period | 137 |
|
| 4 | [adj] [prep] a long period | 13 |
|
