| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period [prep] a | 18 |
|
| 2 | [noun sg] over a period [prep] a | 9 |
|
| 3 | [noun pl] over a period [prep] a | 8 |
|
| 4 | over a [adj] period [prep] a | 6 |
|
| 5 | over a [adj] period [prep] a | 6 |
|
| 6 | over a period [prep] a [noun sg] | 15 |
|
| 7 | over a period [prep] a [noun] | 15 |
|
| 8 | over a period [prep] a [adj] | 12 |
|
| 9 | over a period [prep] a few | 11 |
|
| 10 | over a period [prep] a few | 11 |
|
| 11 | over a period [prep] a [det] | 11 |
|
| 12 | over a period [prep] a year | 5 |
|
| 13 | over a period [prep] a year | 5 |
|
