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Word: boulder (lookup in dictionary) (lookup stats)
Dates: during 1940-1949
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Word Time Machine

Normalized population density for word "boulder" throughout decades:

1880s : 0.0447
1890s : 0.1602
1900s : 0.1943
1920s : 1.3409
1930s : 2.0877
1940s : 1.0203
1950s : 0.5634
1960s : 0.7371
1970s : 0.8851
1980s : 0.8925
1990s : 1.2878
2000s : 1.0130
2010s : 0.9468