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