Add 'Per Second' Unit to Frequency (#762)

Author: WalkerCodeRanger

Common/UnitDefinitions/Frequency.json

@@ -67,6 +67,18 @@
           "Abbreviations": [ "bpm" ]
         }
       ]
+    },
+    {
+      "SingularName": "PerSecond",
+      "PluralName": "PerSecond",
+      "FromUnitToBaseFunc": "x",
+      "FromBaseToUnitFunc": "x",
+      "Localization": [
+        {
+          "Culture": "en-US",
+          "Abbreviations": [ "s⁻¹" ]
+        }
+      ]
     }
   ]
 }

UnitsNet.NumberExtensions.Tests/GeneratedCode/NumberToFrequencyExtensionsTest.g.cs

@@ -17,6 +17,8 @@ public class FrequencyTests : FrequencyTestsBase
 
         protected override double TerahertzInOneHertz => 1e-12;
 
+        protected override double PerSecondInOneHertz => 1;
+
         protected override double CyclesPerHourInOneHertz => 3600;
 
         protected override double CyclesPerMinuteInOneHertz => 60;