| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | within a [adj] period [prep] | 40 |
|
| 2 | within a [adj] period [prep] | 40 |
|
| 3 | within a [adj] period of | 24 |
|
| 4 | within a short period [prep] | 8 |
|
| 5 | within a reasonable period [prep] | 7 |
|
| 6 | within a given period [prep] | 6 |
|
| 7 | within a [adj] period after | 6 |
|
| 8 | within a specified period [prep] | 6 |
|
