Stores the most occuring frequency for even and odd indices
var evenMax = 0 , oddMax = 0 ; for ( var chr = " " . charCodeAt ( 0 ) ; chr <= " " . charCodeAt ( 0 ) ; chr ++ ) { evenMax = Math . max ( evenMax , freqEven [ chr ] ) ; oddMax = Math . max ( oddMax , freqOdd [ chr ] ) ; }