| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period of [det] | 13 |
|
| 2 | [noun sg] over a period of [det] | 8 |
|
| 3 | [verb] over a period of [det] | 5 |
|
| 4 | [vb pp] over a period of [det] | 5 |
|
| 5 | over a period of a [det] | 11 |
|
| 6 | over a period of a [det] | 11 |
|
| 7 | over a period of [art] [det] | 11 |
|
| 8 | over a period of [art] [det] | 11 |
|
| 9 | over a period of [det] [noun pl] | 23 |
|
| 10 | over a period of [det] [noun] | 23 |
|
| 11 | over a period of [det] year | 12 |
|
| 12 | over a period of [det] years | 12 |
|
