def bigram_compare(word1_bigrams, word2_bigrams)
      most_bigrams = [word1_bigrams.count, word2_bigrams.count].max
      num_matching(word1_bigrams, word2_bigrams).to_f / most_bigrams
    end
def bigram_compare(word1_bigrams, word2_bigrams)
      most_bigrams = [word1_bigrams.count, word2_bigrams.count].max
      num_matching(word1_bigrams, word2_bigrams).to_f / most_bigrams
    end
Returns a value from 0 to 1 for how likely these two words are to be a
 match