| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period | 1796 |
|
| 2 | [prep] a short [noun] | 1673 |
|
| 3 | [prep] a short [noun sg] | 1654 |
|
| 4 | [prep] [art] short period | 226 |
|
| 5 | [prep] [art] short period | 226 |
|
| 6 | [prep] a short period | 202 |
|
| 7 | [prep] a short period | 202 |
|
| 8 | [prep] a short period | 202 |
|
