| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | within a [adj] period [prep] time | 16 |
|
| 2 | within a [adj] period of time | 16 |
|
| 3 | within a [adj] period [prep] time | 16 |
|
| 4 | within a [adj] period [prep] time | 16 |
|
| 5 | within a short period [prep] time | 6 |
|
| 6 | within a short period [prep] time | 6 |
|
