| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] [prep] the [num ord] century | 221 |
|
| 2 | [was/were] [vb pp] [prep] the [num ord] century | 212 |
|
| 3 | [was/were] introduced [prep] the [num ord] [noun] | 18 |
|
| 4 | [was/were] introduced [prep] the [num ord] [noun sg] | 18 |
|
| 5 | [be] introduced [prep] the [num ord] century | 8 |
|
| 6 | [was/were] introduce [prep] the [num ord] century | 7 |
|
| 7 | [was/were] introduced [prep] [art] [num ord] century | 7 |
|
| 8 | [was/were] introduced [prep] the [num ord] century | 7 |
|
| 9 | [was/were] introduced [prep] the [num ord] century | 7 |
|
| 10 | [was/were] introduced [prep] [art] [num ord] century | 7 |
|
| 11 | [was/were] introduced [prep] the [num ord] century | 7 |
|
| 12 | [was/were] introduced [prep] the [adj] century | 7 |
|
