mv *hertz to abbr

src/Abbreviations.bib

@@ -5,3 +5,27 @@
   long = {Volt}
 }
 
+@dualabbreviation{Hz,
+  description = {hertz.},
+  short = {Hz},
+  long = {hertz}
+}
+
+@dualabbreviation{kHz,
+  description = {kilohertz.},
+  short = {kHz},
+  long = {kilohertz}
+}
+
+@dualabbreviation{MHz,
+  description = {megahertz.},
+  short = {MHz},
+  long = {megahertz}
+}
+
+@dualabbreviation{GHz,
+  description = {gigahertz.},
+  short = {GHz},
+  long = {gigahertz}
+}
+

src/Acronyms.bib

@@ -168,30 +168,6 @@
   long = {Internet Protocol Address}
 }
 
-@dualacronym{Hz,
-  description = {hertz.},
-  short = {Hz},
-  long = {hertz}
-}
-
-@dualacronym{kHz,
-  description = {kilohertz.},
-  short = {kHz},
-  long = {kilohertz}
-}
-
-@dualacronym{MHz,
-  description = {megahertz.},
-  short = {MHz},
-  long = {megahertz}
-}
-
-@dualacronym{GHz,
-  description = {gigahertz.},
-  short = {GHz},
-  long = {gigahertz}
-}
-
 @dualacronym{DSLR,
   description = {digital single-lens reflex.},
   short = {DSLR},