| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [verb] back [prep] [art] [adj] century | 113 |
|
| 2 | [verb] back [prep] [art] [num ord] century | 112 |
|
| 3 | [verb] back [prep] [art] last [noun] | 22 |
|
| 4 | [verb] back [prep] [art] last [noun sg] | 20 |
|
| 5 | [verb] [adv] [prep] [art] last century | 13 |
|
| 6 | [verb] [adv prt] [prep] [art] last century | 7 |
|
| 7 | [verb] back [prep] [art] last century | 5 |
|
| 8 | [verb] back [prep] [art] last century | 5 |
|
| 9 | [verb] back [prep] [art] last century | 5 |
|
