| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] the | 93 |
|
| 2 | of a [adj] period [prep] | 41 |
|
| 3 | of a [adj] [prep] the | 36 |
|
| 4 | of [adj] period [prep] the | 15 |
|
