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Word: observatories (lookup in dictionary) (lookup stats)
Dates: during 1950-1959
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Word Time Machine

Normalized population density for word "observatories" throughout decades:

1880s : 1.4793
1890s : 2.6521
1900s : 2.0103
1910s : 0.8216
1920s : 2.1955
1930s : 1.5248
1940s : 1.0668
1950s : 1.5916
1960s : 1.0626
1970s : 1.0958
1980s : 0.5833
1990s : 0.6076
2000s : 0.3481
2010s : 0.3918