| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | over a [noun] | 2521 |
|
| 2 | over a [noun sg] | 2455 |
|
| 3 | [prep] a century | 505 |
|
| 4 | over [art] century | 127 |
|
| 5 | over [art] century | 127 |
|
| 6 | over a century | 114 |
|
| 7 | over a century | 114 |
|
