| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] [art] | 131 |
|
| 2 | of a [adj] [prep] [art] | 49 |
|
| 3 | of a [adj] period [prep] | 41 |
|
| 4 | of [adj] period [prep] [art] | 16 |
|
