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Word: undefined (lookup in dictionary) (lookup stats)
Dates: during 1980-1989
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Word Time Machine

Normalized population density for word "undefined" throughout decades:

1870s : 2.9127
1880s : 0.4402
1890s : 0.1315
1910s : 0.1304
1920s : 0.6291
1930s : 0.8066
1940s : 0.9170
1950s : 0.7930
1960s : 1.3599
1970s : 1.7887
1980s : 0.9514
1990s : 0.8765
2000s : 0.9918