| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period [prep] | 91 |
|
| 2 | [noun] over a [adj] period [prep] | 91 |
|
| 3 | [noun] over a [adj] period of | 71 |
|
| 4 | [noun sg] over a [adj] period [prep] | 62 |
|
| 5 | [noun] over a long period [prep] | 45 |
|
| 6 | [noun pl] over a [adj] period [prep] | 22 |
|
| 7 | [noun] over a prolonged period [prep] | 8 |
|
