| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [noun sg] of time | 191 |
|
| 2 | over a [noun] of time | 190 |
|
| 3 | over a [noun] of time | 187 |
|
| 4 | over a period of time | 185 |
|
| 5 | over a period of time | 185 |
|
