diff --git a/src/Mnemonic.Strings/Regex/RegexPair.cs b/src/Mnemonic.Strings/Regex/RegexPair.cs
index 9e5f324..95ed5a0 100644
--- a/src/Mnemonic.Strings/Regex/RegexPair.cs
+++ b/src/Mnemonic.Strings/Regex/RegexPair.cs
@@ -8,14 +8,16 @@ public sealed record RegexPair
 {
     public System.Text.RegularExpressions.Regex Regex { get; private set; }
     public string Replacement { get; private set; }
+    public int Count { get; private set; }
 
-    public RegexPair(string pattern, string replacement, RegexOptions? options = null)
+    public RegexPair(string pattern, string replacement, int count = 1, RegexOptions? options = null)
     {
         Regex = new System.Text.RegularExpressions.Regex(
-            RegexHelpers.BuildRegexExactPhrasePattern(pattern),
+            RegexHelpers.BuildRegexSubstringPattern(pattern),
             options ?? RegexOptions.Singleline);
 
         Replacement = replacement;
+        Count = count;
     }
 
     public bool IsMatch(ReadOnlySpan<char> input)
@@ -25,6 +27,6 @@ public bool IsMatch(ReadOnlySpan<char> input)
 
     public string Replace(string input)
     {
-        return Regex.Replace(input, Replacement);
+        return Regex.Replace(input, Replacement, Count);
     }
 }
diff --git a/src/Mnemonic.Utilities/Helpers/RegexHelpers.cs b/src/Mnemonic.Utilities/Helpers/RegexHelpers.cs
index 49b89c9..d483f7e 100644
--- a/src/Mnemonic.Utilities/Helpers/RegexHelpers.cs
+++ b/src/Mnemonic.Utilities/Helpers/RegexHelpers.cs
@@ -4,6 +4,11 @@ namespace Mnemonic.Utilities.Helpers;
 
 public static class RegexHelpers
 {
+    public static string BuildRegexSubstringPattern(string input)
+    {
+        return Regex.Escape(input);
+    }
+
     private static readonly string _exactMatchTemplate = "^{0}$";
 
     public static string BuildRegexExactPhrasePattern(string input)