| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] over a period | 180 |
|
| 2 | [noun sg] [conj] over a | 38 |
|
| 3 | [conj] over a period | 29 |
|
| 4 | [noun sg] [conj] a period | 15 |
|
