| No | Pattern | Freq | Relations |
|---|---|---|---|
| 1 | period of [adv] [adj] | 148 |
|
| 2 | period of [adv] [adj] | 148 |
|
| 3 | period of [adv] [num] | 101 |
|
| 4 | period of about [adj] | 52 |
|
| 5 | period of about [adj] | 52 |
|
| 6 | period of [adv] [adj] | 42 |
|
| 7 | period of approximately [adj] | 12 |
|
| 8 | period of approximately [adj] | 12 |
|
| 9 | period of very [adj] | 9 |
|
| 10 | period of around [adj] | 9 |
|
| 11 | period of [adv] rapid | 9 |
|
| 12 | period of very [adj] | 9 |
|
| 13 | period of around [adj] | 9 |
|
| 14 | period of [adv] rapid | 9 |
|
| 15 | period of [adv] two | 8 |
|
| 16 | period of [adv] two | 8 |
|
| 17 | period of [adv] three | 7 |
|
| 18 | period of [adv] three | 7 |
|
| 19 | period of [adv] four | 6 |
|
| 20 | period of [adv] four | 6 |
|
| 21 | period of [adv] five | 6 |
|
| 22 | period of nearly [adj] | 6 |
|
| 23 | period of [adv] five | 6 |
|
| 24 | period of only [adj] | 6 |
|
| 25 | period of [adv] one | 6 |
|
| 26 | period of [adv] one | 6 |
|
| 27 | period of nearly [adj] | 6 |
|
| 28 | period of only [adj] | 6 |
|
| 29 | period of [adv] twenty | 6 |
|
| 30 | period of over [adj] | 6 |
|
