| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adv] over a period [prep] | 60 |
|
| 2 | [adv prt] over a period [prep] | 25 |
|
| 3 | up [prep] a period [prep] | 14 |
|
| 4 | up [prep] a period [prep] | 14 |
|
| 5 | up over a [noun] [prep] | 13 |
|
| 6 | up over [art] period [prep] | 9 |
|
| 7 | up over a period [prep] | 8 |
|
| 8 | up over a period [prep] | 8 |
|
| 9 | up over a period [prep] | 8 |
|
