class String
	def word_count
		self.split(" ").count
	end

	def unique_words
		self.split(" ").uniq
	end

	def unique_word_count
		unique_words.count
	end

	def word_frequencies
		frequencies = Hash.new(0)
		self.split(" ").each do |word|
			frequencies[word.to_sym] += 1
		end
		return frequencies
	end
end