| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] over a period of [noun] | 19 |
|
| 2 | [conj] [prep] a period of time | 18 |
|
| 3 | [conj] [prep] a period of time | 18 |
|
| 4 | [conj] over a [noun sg] of time | 14 |
|
| 5 | [conj] over a period of time | 14 |
|
| 6 | [conj] over a period [prep] time | 14 |
|
| 7 | [conj] over a [noun] of time | 14 |
|
| 8 | [conj] over a period of time | 14 |
|
| 9 | [conj] over [art] period of time | 14 |
|
