| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun prp] over [art] period [prep] | 14 |
|
| 2 | [noun prp] over [art] period of | 13 |
|
| 3 | [noun prp] over a period [prep] | 12 |
|
| 4 | [noun prp] over a period [prep] | 12 |
|
