First implementation

Recyclable.Collections/FrequencyTupleComparer.cs

@@ -0,0 +1,10 @@
+namespace Recyclable.Collections
+{
+	internal class FrequencyTupleComparer<TKey, TValue> : IComparer<(TKey Key, TValue Value)>
+	{
+		private static readonly IComparer<TKey> _baseComparer = Comparer<TKey>.Default;
+
+		public int Compare((TKey Key, TValue Value) x, (TKey Key, TValue Value) y)
+			=> _baseComparer.Compare(x.Key, y.Key);
+	}
+}