| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] long period [prep] | 159 |
|
| 2 | [prep] long period [prep] | 159 |
|
| 3 | over [adj] period [prep] | 73 |
|
| 4 | over [adj] period [prep] | 55 |
|
| 5 | over long [noun] [prep] | 36 |
|
| 6 | over long period [prep] | 26 |
|
| 7 | over long period [prep] | 26 |
|
| 8 | over long period [prep] | 26 |
|
