| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a [adj] period [prep] | 97 |
|
| 2 | [noun] over a [adj] period [prep] | 91 |
|
| 3 | [noun] over a [adj] period of | 77 |
|
| 4 | [noun] over a [adj] period of | 77 |
|
| 5 | [noun sg] over a [adj] period [prep] | 67 |
|
| 6 | [noun] over a long period [prep] | 50 |
|
| 7 | [noun] over a long period [prep] | 45 |
|
| 8 | [noun pl] over a [adj] period [prep] | 23 |
|
| 9 | [noun] over a prolonged period [prep] | 8 |
|
| 10 | [noun] over a prolonged period [prep] | 8 |
|
| 11 | [noun] over a [adj -er] period [prep] | 6 |
|
| 12 | [noun] over a longer period [prep] | 5 |
|
