| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adj] period | 766 |
|
| 2 | [noun] [prep] a [adj] period | 704 |
|
| 3 | [noun] [prep] a short [noun] | 489 |
|
| 4 | [noun] [prep] a short [noun sg] | 485 |
|
| 5 | [noun] [prep] a short period | 55 |
|
| 6 | [noun] [prep] [art] short period | 51 |
|
| 7 | [noun] [prep] [art] short period | 51 |
|
| 8 | [noun] [prep] a short period | 48 |
|
| 9 | [noun] [prep] a short period | 48 |
|
| 10 | [noun] [prep] a short period | 48 |
|
