| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [art] [adj] period | 5001 |
|
| 2 | [prep] [art] [adj] of | 4906 |
|
| 3 | [prep] [art] period of | 2328 |
|
| 4 | [art] [adj] period of | 1401 |
|
| 5 | [prep] [adj] period of | 208 |
|
