| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] at the [adj] time | 863 |
|
| 2 | introduce [prep] the [adj] time | 21 |
|
| 3 | introduce at the [adj] [noun] | 19 |
|
| 4 | introduce at the [adj] [noun sg] | 17 |
|
| 5 | introduce at the [adj] time | 9 |
|
| 6 | introduce at [art] [adj] time | 9 |
|
