| Similarity | Rank | |
|---|---|---|
| prewar | 0.920 | 81543 |
| post-war | 0.867 | 26889 |
| postwar | 0.843 | 32657 |
| war-time | 0.791 | 99605 |
| wartime | 0.782 | 22754 |
| post-World | 0.769 | 71516 |
| 1930s | 0.758 | 11976 |
| WWII | 0.754 | 14497 |
| 1930's | 0.750 | 26347 |
| 1920s | 0.748 | 14792 |
| '30s | 0.739 | 67801 |
| WW2 | 0.735 | 34959 |
| WWI | 0.730 | 36445 |
| 1920's | 0.727 | 30219 |
| 1950s | 0.723 | 9648 |
| mid-1950s | 0.717 | 83299 |
| 1940s | 0.716 | 16777 |
| 1960s | 0.704 | 7911 |
| 1940's | 0.703 | 33633 |
| 1950's | 0.701 | 20985 |
| WW1 | 0.699 | 62008 |
| '40s | 0.699 | 67219 |
| turn-of-the-century | 0.693 | 74289 |
| 19th-century | 0.692 | 39002 |
| mid-20th | 0.687 | 75724 |