| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [prep] long period of | 38 |
|
| 2 | [noun] [prep] long period of | 38 |
|
| 3 | [noun] over [adj] period of | 28 |
|
| 4 | [noun] over [adj] period of | 23 |
|
| 5 | [noun] over long [noun] of | 15 |
|
| 6 | [noun] over long period [prep] | 15 |
|
| 7 | [noun] over long period [prep] | 15 |
|
| 8 | [noun] over long period of | 13 |
|
| 9 | [noun] over long period of | 13 |
|
| 10 | [noun] over long period of | 13 |
|
