| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [prep] [adv] a [noun] | 151 |
|
| 2 | [prep] [prep] [adv] a century | 8 |
|
| 3 | [prep] [prep] [adv] a century | 8 |
|
| 4 | for [prep] [adv] a century | 6 |
|
| 5 | for [prep] [adv] [art] century | 6 |
|
