| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | than a [noun] [prep] | 2119 |
|
| 2 | [conj] a century [prep] | 23 |
|
| 3 | [subord] a century [prep] | 20 |
|
| 4 | than [art] century [prep] | 19 |
|
| 5 | than a century [prep] | 18 |
|
| 6 | than a century [prep] | 18 |
|
