| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [adj] period | 519 |
|
| 2 | [prep] a considerable period | 28 |
|
| 3 | [prep] a considerable period | 28 |
|
| 4 | over a considerable [noun] | 14 |
|
| 5 | over [art] considerable period | 7 |
|
| 6 | over [art] considerable period | 7 |
|
| 7 | over a considerable period | 7 |
|
| 8 | over a considerable period | 7 |
|
