| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [adj -er] period | 146 |
|
| 2 | [prep] a longer period | 86 |
|
| 3 | for a [adj -er] period | 63 |
|
| 4 | for a [adj -er] period | 63 |
|
| 5 | over a [adj -er] period | 56 |
|
| 6 | over a [adj -er] period | 56 |
|
| 7 | [prep] a shorter period | 24 |
|
| 8 | [prep] a further period | 19 |
|
| 9 | [prep] a later period | 11 |
|
| 10 | of a [adj -er] period | 5 |
|
| 11 | of a [adj -er] period | 5 |
|
| 12 | after a [adj -er] period | 5 |
|
| 13 | after a [adj -er] period | 5 |
|
