| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | go back many [noun pl] | 13 |
|
| 2 | go back many [noun] | 13 |
|
| 3 | go back many years | 7 |
|
| 4 | go back many year | 7 |
|
| 5 | go back many century | 5 |
|
| 6 | go back many centuries | 5 |
|
