| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] [art] period | 2807 |
|
| 2 | [noun] [prep] [art] and | 106 |
|
| 3 | [prep] [art] period and | 64 |
|
| 4 | [noun] [prep] period and | 6 |
|
