| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period | 307 |
|
| 2 | [noun prp] [prep] a [adj] period | 35 |
|
| 3 | [noun prp] [prep] a [adj] period | 35 |
|
| 4 | [noun prp] over a [adj] [noun] | 29 |
|
| 5 | [noun prp] over [art] [adj] period | 17 |
|
| 6 | [noun prp] over a [adj] period | 10 |
|
