| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun sg] over [art] long period | 30 |
|
| 2 | [adj] [noun sg] over a long period | 30 |
|
| 3 | [adj] [noun sg] over a long period | 30 |
|
| 4 | [adj] [noun sg] over [art] long period | 27 |
|
| 5 | [adj] [noun sg] over [art] long period | 24 |
|
| 6 | [adj] [noun sg] over [art] longer period | 6 |
|
