Frequencies of items calculator

Calcuates a matrix of item frequencies in the input sequence a. The first column of the matrix contains a value from the input sequence, the second column a corresponding frequency of the value in the input sequence.
sequence a:
 Upload Excel or CSV file for batch operation: (read about supported files and formats)
  API URL: http://calculator.vhex.net/c/item-frequency (see documentation. JSONP is now available)