| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over long periods of | 13 |
|
| 2 | [noun sg] over long periods of | 6 |
|
| 3 | [noun pl] over long periods of | 6 |
|
| 4 | over long periods of [noun sg] | 19 |
|
| 5 | over long periods of time | 19 |
|
| 6 | over long periods of time | 19 |
|
| 7 | over long periods of [noun] | 19 |
|
