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

Normalized population density for word "problem" throughout decades:

1870s : 0.0732
1880s : 0.0990
1890s : 0.1448
1900s : 0.2589
1910s : 0.5175
1920s : 0.6415
1930s : 0.6998
1940s : 0.9093
1950s : 1.0373
1960s : 1.1168
1970s : 1.1613
1980s : 1.2304
1990s : 1.2510
2000s : 1.0934
2010s : 1.1626