| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] | 1333 |
|
| 2 | of a [adj] [prep] | 163 |
|
| 3 | of a [adj] period | 76 |
|
| 4 | of a period [prep] | 52 |
|
| 5 | of [adj] period [prep] | 41 |
|
