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Word: sinkhole (lookup in dictionary) (lookup stats)
Dates: during 1920-1929
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Word Time Machine

Normalized population density for word "sinkhole" throughout decades:

1920s : 0.1933
1930s : 0.5859
1940s : 0.4227
1950s : 0.3520
1960s : 0.5433
1970s : 0.4962
1980s : 2.1570
1990s : 1.3131
2000s : 1.5546