| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [noun prp] over a period | 6 |
|
| 2 | [prep] [noun prp] over a period | 6 |
|
| 3 | [noun prp] [noun] over a period | 6 |
|
| 4 | [noun prp] over a [adj] period | 9 |
|
| 5 | [noun prp] over a [adj] period | 9 |
|
| 6 | [noun prp] over a period [prep] | 12 |
|
| 7 | [noun prp] over a period of | 12 |
|
| 8 | [noun prp] over a period of | 12 |
|
| 9 | [noun prp] over a period [prep] | 12 |
|
