| Similarity | Rank | |
|---|---|---|
| decade | 0.899 | 2984 |
| quarter-century | 0.862 | 79790 |
| years | 0.849 | 125 |
| half-century | 0.814 | 46674 |
| Decades | 0.777 | 41705 |
| decade's | 0.764 | 66905 |
| past | 0.761 | 368 |
| 1990s | 0.752 | 7471 |
| 1980s | 0.750 | 7178 |
| 1970s | 0.735 | 7314 |
| mid-1990s | 0.729 | 35693 |
| mid-1970s | 0.727 | 53815 |
| 1990's | 0.726 | 20839 |
| 1960s | 0.716 | 7911 |
| ago | 0.713 | 494 |
| mid-1980s | 0.712 | 43287 |
| nineties | 0.710 | 28357 |
| 1980's | 0.708 | 18127 |
| 2000s | 0.696 | 26262 |
| generations | 0.695 | 4259 |
| mid-1960s | 0.692 | 63672 |
| eighties | 0.691 | 24958 |
| decade-long | 0.691 | 60294 |
| 1970's | 0.690 | 18387 |
| mid-2000s | 0.687 | 94089 |