| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun pl] over a period of | 102 |
|
| 2 | [noun pl] over a number of | 23 |
|
| 3 | [noun pl] over a range of | 8 |
|
| 4 | [noun pl] over a couple of | 7 |
|
