Randomness

"In the 1840s, the polka was sweeping America. It was the latest dance craze, like the Charleston of the 1920s or the Macarena of a few summers ago. In an effort to cash in on the fad, manufacturers began naming all sorts of thing polka. Polka gauze, polka hats, polka curtain bands and many other products with the polka name hit the market in the 1840s. Although, the actual term polka dot is not attested to until the 1880s. Of these, only polka dots survive today."
-Wordorigins.org