| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] [was/were] introduce in the [num ord] | 8 |
|
| 2 | [noun sg] [was/were] introduce in the [num ord] | 5 |
|
| 3 | [was/were] introduce in the [num ord] [noun] | 11 |
|
| 4 | [was/were] introduce in the [num ord] [noun sg] | 11 |
|
| 5 | [was/were] introduce in the [num ord] century | 6 |
|
| 6 | [was/were] introduce in the [num ord] century | 6 |
|
