| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period [prep] the | 93 |
|
| 2 | [be] a [adj] [prep] the | 81 |
|
| 3 | [be] a [adj] period [prep] | 63 |
|
| 4 | [be] a period [prep] the | 5 |
|
