| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [conj] over a period of [noun] | 19 |
|
| 2 | and over a [noun] of [noun] | 14 |
|
| 3 | and [prep] a period of [noun] | 13 |
|
| 4 | and [prep] a period of [noun] | 13 |
|
| 5 | and over a [noun sg] of [noun] | 12 |
|
| 6 | and over a period of [noun] | 9 |
|
| 7 | and over a period of [noun] | 9 |
|
| 8 | and over a period of [noun] | 9 |
|
| 9 | and over a period [prep] [noun] | 9 |
|
| 10 | and over [art] period of [noun] | 9 |
|
| 11 | and over a period [prep] [noun] | 9 |
|
