| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over [art] [adj] period of [noun] | 125 |
|
| 2 | over [art] [adj] [noun] of years | 41 |
|
| 3 | [prep] [art] [adj] period of years | 6 |
|
| 4 | over [art] [adj] period of [noun pl] | 6 |
|
| 5 | [prep] [art] [adj] period of years | 6 |
|
| 6 | over [art] [adj] period [prep] years | 5 |
|
| 7 | over [art] [adj] period [prep] years | 5 |
|
| 8 | over [art] [adj] period of years | 5 |
|
| 9 | over [art] [adj] period of year | 5 |
|
| 10 | over [art] [adj] period of years | 5 |
|
| 11 | over [art] [adj] period of years | 5 |
|
