| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [prep] [det] than half a [noun] | 51 |
|
| 2 | [prep] [det] than half [art] century | 16 |
|
| 3 | [prep] [adj] than half a century | 15 |
|
| 4 | [prep] [det] [conj] half a century | 15 |
|
| 5 | [prep] [det] than [adj] a century | 15 |
|
| 6 | [prep] [det] [subord] half a century | 15 |
|
| 7 | [prep] [det] than half a century | 15 |
|
| 8 | [prep] [det] than half a century | 15 |
|
