| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] [num] year period [prep] | 16 |
|
| 2 | over [art] [adj] year period [prep] | 16 |
|
| 3 | over [art] [adj] year period [prep] | 16 |
|
| 4 | over a [adj] year period [prep] | 11 |
|
| 5 | over a [adj] year period [prep] | 11 |
|
| 6 | over the [adj] year period [prep] | 5 |
|
| 7 | over the [adj] year period [prep] | 5 |
|
