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Special Relativity was in the air in 1906. General Relativity wasn't. The comments on that Quora post make a similar point. Edit: Whoops! It was obviously in the air in 1906, since Einstein published in 1905. :)
Or just say: from collections import Counter freqs = Counter("abracadabra") I was surprised to see that missing, given that Counter was mentioned in the next section.
Special Relativity was in the air in 1906. General Relativity wasn't. The comments on that Quora post make a similar point. Edit: Whoops! It was obviously in the air in 1906, since Einstein published in 1905. :)
Or just say: from collections import Counter freqs = Counter("abracadabra") I was surprised to see that missing, given that Counter was mentioned in the next section.