| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [coord] [prep] a [adj] period [prep] | 14 |
|
| 2 | [coord] [prep] a [adj] period [prep] | 14 |
|
| 3 | [coord] [prep] a [adj] period of | 11 |
|
| 4 | [coord] [prep] a [adj] period of | 11 |
|
| 5 | and [prep] a [adj] period [prep] | 7 |
|
| 6 | or [prep] a [adj] period [prep] | 6 |
|
| 7 | [coord] for a [adj] period [prep] | 6 |
|
| 8 | [coord] for a [adj] period [prep] | 6 |
|
