| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [was/were] [verb] [prep] the [num ord] century | 222 |
|
| 2 | [was/were] [v-ing] [prep] the [num ord] [noun] | 84 |
|
| 3 | [be] [v-ing] [prep] the [num ord] century | 16 |
|
| 4 | [was/were] [v-ing] [prep] the [adj] century | 7 |
|
| 5 | [was/were] [v-ing] [prep] the [num ord] century | 7 |
|
| 6 | [was/were] [v-ing] [prep] [art] [num ord] century | 7 |
|
