| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period of | 77 |
|
| 2 | [noun] over a [adj] period of | 71 |
|
| 3 | [noun] [prep] a long period of | 62 |
|
| 4 | [noun] over a long period of | 45 |
|
| 5 | [noun] over a long period [prep] | 45 |
|
| 6 | [noun] over a long [noun] of | 41 |
|
| 7 | [noun] over a long period of | 40 |
|
| 8 | [noun] over [art] long period of | 40 |
|
| 9 | [noun] over [art] long period of | 40 |
|
