| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj] period and | 54 |
|
| 2 | [prep] a [adj] period and | 50 |
|
| 3 | over a [adj] period and | 19 |
|
| 4 | over a [adj] period and | 19 |
|
| 5 | for a [adj] period and | 17 |
|
| 6 | for a [adj] period and | 17 |
|
| 7 | [prep] a long period and | 13 |
|
| 8 | [prep] a long period and | 11 |
|
| 9 | [prep] a short period and | 8 |
|
| 10 | [prep] a short period and | 6 |
|
| 11 | [prep] a limited period and | 5 |
|
| 12 | in a [adj] period and | 5 |
|
| 13 | in a [adj] period and | 5 |
|
| 14 | [prep] a limited period and | 5 |
|
