| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] [noun] period and | 10 |
|
| 2 | [prep] a [adj] [noun sg] period and | 9 |
|
| 3 | [prep] a [adj] [noun] period and | 9 |
|
| 4 | to a [adj] [noun] period and | 5 |
|
| 5 | to a [adj] [noun] period and | 5 |
|
