| Similarity | Rank | |
|---|---|---|
| 1930 | 0.852 | 40274 |
| 1940 | 0.832 | 55737 |
| 1950 | 0.824 | 23208 |
| the_1920 | 0.802 | 50431 |
| 1960 | 0.769 | 27261 |
| and_1930 | 0.761 | 64056 |
| of_the_1920 | 0.757 | 73122 |
| 1970 | 0.746 | 27604 |
| in_the_1920 | 0.743 | 18295 |
| the_1930 | 0.741 | 34500 |
| the_1940 | 0.731 | 73356 |
| and_1940 | 0.715 | 82992 |
| the_1950 | 0.710 | 32477 |
| early_[number]_century | 0.707 | 23404 |
| in_the_1930 | 0.704 | 14463 |
| in_the_1940 | 0.693 | 24811 |
| the_early_twentieth_century | 0.690 | 43256 |
| from_the_1950 | 0.690 | 96102 |
| during_the_1920 | 0.688 | 91310 |
| of_the_1930 | 0.684 | 48992 |
| 50 | 0.684 | 17439 |
| of_the_1950 | 0.684 | 52245 |
| the_1960 | 0.683 | 24570 |
| 1980 | 0.675 | 35792 |
| '60s | 0.675 | 70225 |