| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | back in [num] | 421 |
|
| 2 | back in [adj] | 160 |
|
| 3 | back in [det] | 70 |
|
| 4 | back in [num ord] | 26 |
|
| 5 | back in 1988 | 20 |
|
| 6 | back in 1988 | 20 |
|
| 7 | back in this | 19 |
|
| 8 | back in this | 19 |
|
| 9 | back in nineteen | 18 |
|
| 10 | back in nineteen | 18 |
|
| 11 | back in that | 18 |
|
| 12 | back in that | 18 |
|
| 13 | back in two | 17 |
|
| 14 | back in two | 17 |
|
| 15 | back in one | 16 |
|
| 16 | back in one | 16 |
|
| 17 | back in 1989 | 15 |
|
| 18 | back in full | 15 |
|
| 19 | back in 1989 | 15 |
|
| 20 | back in full | 15 |
|
| 21 | back in 1990 | 14 |
|
| 22 | back in 1990 | 14 |
|
| 23 | back in third | 13 |
|
| 24 | back in third | 13 |
|
| 25 | back in some | 11 |
|
| 26 | back in five | 11 |
|
| 27 | back in 1986 | 11 |
|
| 28 | back in some | 11 |
|
| 29 | back in five | 11 |
|
| 30 | back in three | 11 |
|
