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Word: duo (lookup in dictionary) (lookup stats)
Dates: during 1870-1879
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Word Time Machine

Normalized population density for word "duo" throughout decades:

1870s : 0.3756
1880s : 0.0757
1890s : 0.0339
1900s : 0.0411
1910s : 0.0504
1920s : 0.0562
1930s : 0.0662
1940s : 0.2046
1950s : 0.2310
1960s : 0.4278
1970s : 0.7592
1980s : 1.4587
1990s : 1.4579
2000s : 2.3567
2010s : 2.6860