| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | be introduced [prep] the [num ord] [noun sg] | 26 |
|
| 2 | be introduce in the [num ord] [noun sg] | 14 |
|
| 3 | be introduce [prep] the first [noun sg] | 12 |
|
| 4 | was introduce [prep] the [num ord] [noun sg] | 12 |
|
| 5 | be introduce [prep] the [num ord] century | 8 |
|
| 6 | were introduce [prep] the [num ord] [noun sg] | 7 |
|
| 7 | be introduce [prep] the [num ord] time | 6 |
|
| 8 | be introduce for the [num ord] [noun sg] | 6 |
|
