| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a much [adj -er] period | 23 |
|
| 2 | [prep] a much longer period | 16 |
|
| 3 | over a much [adj -er] period | 10 |
|
| 4 | over a much [adj -er] period | 10 |
|
| 5 | for a much [adj -er] period | 9 |
|
| 6 | for a much [adj -er] period | 9 |
|
| 7 | [prep] a much shorter period | 6 |
|
