| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be introduce for the [num ord] [noun] | 6 |
|
| 2 | be introduce for the [num ord] time | 6 |
|
| 3 | be introduce for the [num ord] [noun sg] | 6 |
|
| 4 | be introduce for the [num ord] time | 6 |
|
