| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | [noun] for the [num ord] 18 [noun pl] | 10 |
|
| 2 | [noun] for the [num ord] 18 [noun] | 10 |
|
| 3 | [noun] for the [num ord] 18 months | 9 |
|
| 4 | [noun] for the [num ord] 18 month | 9 |
|
