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Word: reference (lookup in dictionary) (lookup stats)
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Word Time Machine

Normalized population density for word "reference" throughout decades:

1870s : 3.7351
1880s : 3.2927
1890s : 1.9959
1900s : 1.6637
1910s : 1.1872
1920s : 1.2949
1930s : 1.2256
1940s : 0.7734
1950s : 0.8675
1960s : 0.8580
1970s : 0.8347
1980s : 0.8045
1990s : 0.8449
2000s : 0.9047
2010s : 1.0898