| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | date back to the [adj] [noun sg] | 80 |
|
| 2 | date back to the [num ord] [noun] | 69 |
|
| 3 | date back to the [adj] century | 66 |
|
| 4 | date back to the [adj] century | 66 |
|
| 5 | dating back to the [adj] [noun] | 45 |
|
| 6 | dates back to the [adj] [noun] | 34 |
|
| 7 | date back to the [adj] [noun] | 26 |
|
| 8 | date back to the [adj] [noun pl] | 13 |
|
| 9 | date back to the [adj] [noun] | 11 |
|
| 10 | date back to the middle [noun] | 7 |
|
| 11 | date back to the middle [noun] | 7 |
|
| 12 | date back to the [adj] age | 6 |
|
| 13 | date back to the [adj] ages | 6 |
|
| 14 | date back to the 13th [noun] | 6 |
|
| 15 | date back to the last [noun] | 6 |
|
| 16 | date back to the 13th [noun] | 6 |
|
| 17 | date back to the last [noun] | 6 |
|
| 18 | date back to the 12th [noun] | 5 |
|
| 19 | date back to the 14th [noun] | 5 |
|
| 20 | date back to the 14th [noun] | 5 |
|
| 21 | date back to the 12th [noun] | 5 |
|
