| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] a [adj] period | 766 |
|
| 2 | [noun] [prep] a specified [noun] | 174 |
|
| 3 | [noun] [prep] a specified [noun sg] | 172 |
|
| 4 | [noun] [prep] [art] specified period | 32 |
|
| 5 | [noun] [prep] [art] specified period | 32 |
|
| 6 | [noun] [prep] a specified period | 29 |
|
| 7 | [noun] [prep] a specified period | 29 |
|
| 8 | [noun] [prep] a specified period | 29 |
|
