| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period | 519 |
|
| 2 | over a [adj] period | 462 |
|
| 3 | over [art] 10-year period | 9 |
|
| 4 | [prep] a 10-year period | 9 |
|
| 5 | [prep] a 10-year period | 9 |
|
| 6 | over [art] 10-year period | 9 |
|
| 7 | over a 10-year [noun] | 9 |
|
| 8 | over a 10-year period | 8 |
|
| 9 | over a 10-year period | 8 |
|
| 10 | over a 10-year period | 8 |
|
