| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun sg] [coord] [prep] a period of | 10 |
|
| 2 | [noun sg] [coord] [prep] a period of | 10 |
|
| 3 | [noun sg] [coord] over a [noun] of | 8 |
|
| 4 | [noun sg] [coord] over a [noun sg] of | 7 |
|
| 5 | [noun sg] [conj] over a period of | 6 |
|
| 6 | [noun] [coord] over a period of | 6 |
|
| 7 | [noun sg] [coord] over a period of | 5 |
|
| 8 | [noun sg] [coord] over [art] period of | 5 |
|
| 9 | [noun sg] [coord] over a period of | 5 |
|
| 10 | [noun sg] [coord] over a period [prep] | 5 |
|
