| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | for [det] than half a [noun] | 25 |
|
| 2 | [prep] [det] than half a century | 15 |
|
| 3 | [prep] [det] than half a century | 15 |
|
| 4 | for [det] than half [art] century | 13 |
|
| 5 | for [adj] than half a century | 12 |
|
| 6 | for [det] [subord] half a century | 12 |
|
| 7 | for [det] than [adj] a century | 12 |
|
| 8 | for [det] than half a century | 12 |
|
| 9 | for [det] [conj] half a century | 12 |
|
| 10 | for [det] than half a century | 12 |
|
