| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] over a period of five | 9 |
|
| 2 | over a period of five [noun pl] | 14 |
|
| 3 | over a period of five [noun] | 14 |
|
| 4 | over a period of five year | 12 |
|
| 5 | over a period of five years | 12 |
|
