| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period of | 71 |
|
| 2 | [noun] over a [adj] period of | 71 |
|
| 3 | [noun sg] over a [adj] period of | 50 |
|
| 4 | [noun] over a long period of | 40 |
|
| 5 | [noun pl] over a [adj] period of | 16 |
|
| 6 | [noun] over a prolonged period of | 7 |
|
