| Similarity | Rank | |
|---|---|---|
| decade | 0.892 | 2984 |
| half-century | 0.878 | 46674 |
| decades | 0.862 | 2346 |
| decade's | 0.819 | 66905 |
| decade-long | 0.801 | 60294 |
| twenty-year | 0.773 | 97910 |
| mid-1970s | 0.767 | 53815 |
| decades-long | 0.766 | 62316 |
| mid-1990s | 0.760 | 35693 |
| 1990s | 0.751 | 7471 |
| mid-1980s | 0.748 | 43287 |
| 1980s | 0.748 | 7178 |
| mid-1960s | 0.747 | 63672 |
| 40-year | 0.744 | 56085 |
| 1970s | 0.740 | 7314 |
| twentieth | 0.734 | 14125 |
| 1960s | 0.729 | 7911 |
| mid-1950s | 0.726 | 83299 |
| mid-20th | 0.726 | 75724 |
| century's | 0.718 | 54113 |
| 1990's | 0.717 | 20839 |
| mid-2000s | 0.716 | 94089 |
| heyday | 0.716 | 29800 |
| Decades | 0.715 | 41705 |
| 50-year | 0.712 | 58615 |