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

Normalized population density for word "voluntary" throughout decades:

1870s : 4.3247
1880s : 2.9510
1890s : 1.8730
1900s : 0.5490
1910s : 2.5873
1920s : 0.8655
1930s : 0.9774
1940s : 1.3092
1950s : 1.1041
1960s : 1.2555
1970s : 1.0915
1980s : 0.8590
1990s : 0.6182
2000s : 0.6066
2010s : 0.5036