| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] a [noun sg] over a period | 7 |
|
| 2 | [prep] a [noun sg] over a period | 7 |
|
| 3 | a [adj] [noun sg] over a period | 12 |
|
| 4 | a [adj] [noun sg] over a period | 12 |
|
| 5 | a [noun sg] over a [adj] period | 5 |
|
| 6 | a [noun sg] over a [adj] period | 5 |
|
| 7 | a [noun sg] over a period of | 11 |
|
| 8 | a [noun sg] over a period of | 11 |
|
| 9 | a [noun sg] over a period [prep] | 11 |
|
| 10 | a [noun sg] over a period [prep] | 11 |
|
