| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a much longer period | 16 |
|
| 2 | [prep] a much longer period | 16 |
|
| 3 | over a much longer [noun] | 12 |
|
| 4 | over a [adv] longer period | 12 |
|
| 5 | over a much longer [noun sg] | 12 |
|
| 6 | over a much [adj] period | 10 |
|
| 7 | over a much [adj -er] period | 10 |
|
| 8 | over [art] much longer period | 9 |
|
| 9 | over a much long period | 9 |
|
| 10 | over a much longer period | 9 |
|
| 11 | over a much longer period | 9 |
|
