| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] over a period | 83 |
|
| 2 | [vb pp] over a period | 78 |
|
| 3 | spread over a [noun] | 10 |
|
| 4 | spread over a [noun sg] | 10 |
|
| 5 | spread over [art] period | 6 |
|
| 6 | spread over [art] period | 6 |
|
| 7 | spread over a period | 5 |
|
| 8 | spread over a period | 5 |
|
| 9 | spread [prep] a period | 5 |
|
| 10 | spread [prep] a period | 5 |
|
| 11 | spread over a period | 5 |
|
| 12 | spread over a period | 5 |
|
