| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] [art] [adj] period of | 177 |
|
| 2 | be [verb] [art] [adj] of | 130 |
|
| 3 | be [art] [adj] period of | 52 |
|
| 4 | be [verb] [art] [adj] period | 16 |
|
| 5 | be [verb] [art] period of | 16 |
|
