| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | at [noun prp] [prep] the [adj] century | 10 |
|
| 2 | at [noun prp] [prep] the [num ord] century | 10 |
|
| 3 | at [noun prp] [prep] the [adj] century | 10 |
|
| 4 | at [noun prp] in the [adj] century | 6 |
|
| 5 | at [noun prp] in the [adj] century | 6 |
|
