| Similarity | Rank | |
|---|---|---|
| over_a_decade_ago | 0.760 | 94008 |
| a_decade_ago | 0.748 | 23265 |
| several_year_ago | 0.745 | 13891 |
| nearly_[number]_year_ago | 0.735 | 48159 |
| in_the_late_1990 | 0.719 | 26724 |
| more_than_[number]_year_ago | 0.717 | 24310 |
| three_year_ago | 0.716 | 17729 |
| in_the_early_1990 | 0.714 | 17920 |
| almost_[number]_year_ago | 0.714 | 51448 |
| six_year_ago | 0.711 | 44920 |
| five_year_ago | 0.708 | 21349 |
| in_the_mid-1990 | 0.704 | 42919 |
| two_year_ago | 0.703 | 9948 |
| two_decade_ago | 0.702 | 95707 |
| eight_year_ago | 0.701 | 65575 |
| decade_ago | 0.691 | 32413 |
| a_few_year_ago | 0.691 | 7726 |
| in_the_mid-1980 | 0.685 | 61405 |
| in_the_early_1980 | 0.685 | 25476 |
| four_year_ago | 0.684 | 22498 |
| in_the_late_1980 | 0.677 | 29771 |
| in_the_1990 | 0.676 | 8453 |
| seven_year_ago | 0.675 | 57324 |
| in_the_late_1970 | 0.673 | 36780 |
| in_the_early_2000 | 0.666 | 43568 |