| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] over a period [prep] | 168 |
|
| 2 | [conj] over a period [prep] | 25 |
|
| 3 | [noun sg] [conj] a period [prep] | 15 |
|
| 4 | [noun sg] [conj] over a period | 7 |
|
