| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [noun] [prep] a long period | 17 |
|
| 2 | [noun sg] [noun] over [art] long period | 14 |
|
| 3 | [noun sg] [noun sg] [prep] [art] long period | 11 |
|
| 4 | [noun sg] [noun pl] [prep] [art] long period | 5 |
|
