| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period and [verb] | 12 |
|
| 2 | [prep] a [adj] period and [verb] | 12 |
|
| 3 | for a [adj] period and [verb] | 6 |
|
| 4 | for a [adj] period and [verb] | 6 |
|
| 5 | a [adj] [noun] period and [verb] | 6 |
|
| 6 | a [adj] [noun sg] period and [verb] | 6 |
|
