| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period [prep] | 183 |
|
| 2 | [noun sg] over a [adj] period | 181 |
|
| 3 | [noun sg] over a period [prep] | 168 |
|
| 4 | [noun sg] a [adj] period [prep] | 6 |
|
| 5 | [noun sg] over [adj] period [prep] | 5 |
|
