| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | an emergency [noun sg] | 471 |
|
| 2 | an air [noun sg] | 343 |
|
| 3 | an army [noun sg] | 335 |
|
| 4 | an art [noun sg] | 314 |
|
| 5 | an iron [noun sg] | 298 |
|
| 6 | an executive [noun sg] | 267 |
|
| 7 | an information [noun sg] | 259 |
|
| 8 | an insurance [noun sg] | 250 |
|
| 9 | an oil [noun sg] | 234 |
|
| 10 | an [noun sg] system | 230 |
|
| 11 | an adult [noun sg] | 218 |
|
| 12 | an [noun sg] form | 217 |
|
| 13 | an investment [noun sg] | 209 |
|
| 14 | an expert [noun sg] | 198 |
|
| 15 | an evening [noun sg] | 197 |
|
| 16 | an [noun sg] rate | 172 |
|
| 17 | an election [noun sg] | 166 |
|
| 18 | an operating [noun sg] | 165 |
|
| 19 | an [noun sg] company | 160 |
|
| 20 | an application [noun sg] | 156 |
|
| 21 | an estate [noun sg] | 146 |
|
| 22 | an advertising [noun sg] | 145 |
|
| 23 | an ice [noun sg] | 144 |
|
| 24 | an [noun sg] clause | 139 |
|
| 25 | an animal [noun sg] | 139 |
|
| 26 | an office [noun sg] | 136 |
|
| 27 | an engineering [noun sg] | 136 |
|
| 28 | an energy [noun sg] | 126 |
|
| 29 | an [noun sg] agent | 126 |
|
| 30 | an accounting [noun sg] | 123 |
|
