| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period | 307 |
|
| 2 | [noun] over a [adj] period | 280 |
|
| 3 | [noun] [prep] a long period | 137 |
|
| 4 | [noun] over a long period | 120 |
|
| 5 | [noun] over a long [noun sg] | 107 |
|
| 6 | [noun] over a long [noun] | 107 |
|
| 7 | [noun] over [art] long period | 96 |
|
| 8 | [noun] over a long period | 95 |
|
