| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [be] [adj] over a period of | 6 |
|
| 2 | be [adj] over a period of | 6 |
|
| 3 | [adj] [noun] over a period of | 69 |
|
| 4 | [adj] [noun sg] over a period of | 44 |
|
| 5 | [adj] [noun pl] over a period of | 25 |
|
| 6 | [adj] over a period of [noun] | 11 |
|
| 7 | [adj] over a period of [noun pl] | 7 |
|
| 8 | [adj] over a period of year | 6 |
|
| 9 | [adj] over a period of years | 6 |
|
