| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [adj] [noun sg] over a period of | 57 |
|
| 2 | [adj] [noun sg] over a period [prep] | 57 |
|
| 3 | [adj] [noun sg] over a period [prep] | 44 |
|
| 4 | [det] [noun sg] over a period [prep] | 8 |
|
