| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [verb] [prep] a long | 183 |
|
| 2 | [noun] [prep] a long period | 177 |
|
| 3 | [noun] [verb] [prep] a period | 98 |
|
| 4 | [verb] [prep] a long period | 91 |
|
| 5 | [noun] [verb] a long period | 8 |
|
