| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] over a period [prep] time | 14 |
|
| 2 | [coord] over a period [prep] time | 11 |
|
| 3 | and over a period [prep] [noun] | 9 |
|
| 4 | and [prep] a period [prep] time | 9 |
|
| 5 | and [prep] a period [prep] time | 9 |
|
| 6 | and over a [noun] [prep] time | 7 |
|
| 7 | and over a period [prep] time | 7 |
|
| 8 | and over a period [prep] time | 7 |
|
| 9 | and over a period [prep] time | 7 |
|
| 10 | and over [art] period [prep] time | 7 |
|
| 11 | and over [art] period [prep] time | 7 |
|
| 12 | and over a period [prep] time | 7 |
|
| 13 | and over a [noun sg] [prep] time | 7 |
|
| 14 | and over a period [prep] time | 7 |
|
