| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] over a period of [noun] | 15 |
|
| 2 | [adj] over a period [prep] [noun] | 11 |
|
| 3 | [adj] over a period [prep] [noun pl] | 8 |
|
| 4 | [adj] over a period [prep] time | 7 |
|
| 5 | [adj] over a period [prep] time | 7 |
|
| 6 | [adj] over a period [prep] [noun sg] | 7 |
|
| 7 | [adj] over a period [prep] years | 6 |
|
| 8 | [adj] over a period [prep] year | 6 |
|
