Card Frequencies Final

function solve(args) {
    var count = 0;
    var totalCount = 0;
    var matrix = [];

    for (var i = 0; i < args.length - 1 ; i++) {

        var couple = args[i] + args[i + 1];

        for (var j = 0; j < args.length - 1; j++) {
            var testCouple = args[j] + args[j + 1];
            if (couple === testCouple) {
                count++;
            }
        }
            if (matrix.indexOf(couple + " " + count) === -1) {
                matrix.push(couple + " " + count);
                totalCount += count;
            }
            count = 0;
    }

    for (var i = 0; i < matrix.length; i++) {
        var couple = matrix[i].split(" ");
        console.log(couple[0] + " " + "->" + " " + parseInt(couple[1]) / totalCount * 100 + "%");
    }
}

console.log(solve(['3', '4', '2', '3', '4', '2', '1', '12', '2', '3', '4']));