| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | a [adj] period of [noun sg] | 519 |
|
| 2 | a [adj] period of time | 337 |
|
| 3 | a long period of [noun sg] | 164 |
|
| 4 | a long period of [noun sg] | 146 |
|
| 5 | a short period of [noun sg] | 76 |
|
| 6 | a short period of [noun sg] | 69 |
|
| 7 | a [adj -er] period of [noun sg] | 38 |
|
| 8 | a considerable period of [noun sg] | 22 |
|
| 9 | a brief period of [noun sg] | 22 |
|
| 10 | a certain period of [noun sg] | 22 |
|
| 11 | a considerable period of [noun sg] | 22 |
|
| 12 | a brief period of [noun sg] | 22 |
|
| 13 | a certain period of [noun sg] | 22 |
|
| 14 | a fixed period of [noun sg] | 21 |
|
| 15 | a fixed period of [noun sg] | 21 |
|
| 16 | a limited period of [noun sg] | 19 |
|
| 17 | a limited period of [noun sg] | 19 |
|
| 18 | a longer period of [noun sg] | 18 |
|
| 19 | a prolonged period of [noun sg] | 18 |
|
| 20 | a prolonged period of [noun sg] | 18 |
|
| 21 | a given period of [noun sg] | 14 |
|
| 22 | a given period of [noun sg] | 14 |
|
| 23 | a particular period of [noun sg] | 12 |
|
| 24 | a reasonable period of [noun sg] | 12 |
|
| 25 | a reasonable period of [noun sg] | 12 |
|
| 26 | a lengthy period of [noun sg] | 12 |
|
| 27 | a lengthy period of [noun sg] | 12 |
|
| 28 | a particular period of [noun sg] | 12 |
|
| 29 | a further period of [noun sg] | 11 |
|
| 30 | a far period of [noun sg] | 11 |
|
