Script writes to STDOUT the Twitter clients you've used along with the number of tweets. Save the output as something.csv and open in Excel/Numbers to do interesting things like making charts etc.

twitter_clients.rb

#redirect stdout to something.csv and open it in Numbers/Excel to do whatever you want
require 'csv'
#total_tweets = 0
client_hash = {}
dir_name = "~/path/to/tweetsfolder/" + "data/csv/" #insert path to tweets folder
file_paths_array = Dir.entries(dir_name)
file_paths_array.delete_at(0)
file_paths_array.delete_at(0)
file_paths_array.each do |file_path|
  arr_of_arrs = CSV.read(dir_name+file_path)
	arr_of_arrs.delete_at(0)
	arr_of_arrs.each do |arr|
		client_name = arr[6].gsub(%r{<[^>]*>},"")
		#total_tweets = total_tweets+1
		client_hash[client_name] = client_hash[client_name].to_i() + 1 
	end
end
#puts total_tweets
client_hash.each do |key,value|
	puts key + "," + value.to_s
end