| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] over a period of | 75 |
|
| 2 | [vb pp] over a period of | 70 |
|
| 3 | made over a [noun] of | 8 |
|
| 4 | made [prep] a period of | 7 |
|
| 5 | made [prep] a period of | 7 |
|
| 6 | made over a period [prep] | 5 |
|
| 7 | made over a period [prep] | 5 |
|
| 8 | made over a period of | 5 |
|
| 9 | made over a period of | 5 |
|
| 10 | make over a period of | 5 |
|
| 11 | made over [art] period of | 5 |
|
| 12 | made over [art] period of | 5 |
|
| 13 | made over a period of | 5 |
|
