| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | within a [adj] period [prep] | 40 |
|
| 2 | within a [adj] period [prep] | 40 |
|
| 3 | [prep] a specified period [prep] | 20 |
|
| 4 | within a specified [noun] [prep] | 12 |
|
| 5 | within [art] specified period [prep] | 6 |
|
| 6 | within a specified period [prep] | 6 |
|
| 7 | within a specified period [prep] | 6 |
|
| 8 | within [art] specified period [prep] | 6 |
|
| 9 | within a specified period [prep] | 6 |
|
