| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an [num ord] [noun sg] | 96 |
|
| 2 | an [num ord] century | 44 |
|
| 3 | an [num ord] century | 44 |
|
| 4 | an 18th [noun] | 24 |
|
| 5 | an [num ord] minute | 20 |
|
| 6 | an [num ord] minute | 20 |
|
| 7 | an eighth [noun] | 15 |
|
| 8 | an eleventh [noun] | 13 |
|
| 9 | an eighteenth [noun] | 13 |
|
| 10 | an 11th [noun] | 11 |
|
| 11 | an [num ord] birthday | 7 |
|
| 12 | an [num ord] hour | 7 |
|
| 13 | an [num ord] hour | 7 |
|
| 14 | an [num ord] birthday | 7 |
|
| 15 | an 80th [noun] | 6 |
|
