| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a long [noun sg] of | 85 |
|
| 2 | over a long period of | 84 |
|
| 3 | over a long period of | 84 |
|
| 4 | over a long [noun] of | 78 |
|
| 5 | over a longer [noun] of | 7 |
|
