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