diff --git a/src/Perfolizer/Perfolizer/Helpers/CpuBrandHelper.cs b/src/Perfolizer/Perfolizer/Helpers/CpuBrandHelper.cs
index 28fb867..5a77ec5 100644
--- a/src/Perfolizer/Perfolizer/Helpers/CpuBrandHelper.cs
+++ b/src/Perfolizer/Perfolizer/Helpers/CpuBrandHelper.cs
@@ -67,7 +67,7 @@ public static string ToShortBrandName(this PhdCpu? cpu, bool includeMaxFrequency
             if (cpu.PhysicalCoreCount.HasValue && cpu.PhysicalCoreCount.Value > 0)
                 processorName = Regex.Replace(processorName, @"(\w+?-Core Processor)", "").Trim();
 
-            string? frequencyString = GetBrandStyledActualFrequency(cpu.GetNominalFrequency());
+            string? frequencyString = GetBrandStyledActualFrequency(cpu.NominalFrequency());
             if (includeMaxFrequency && frequencyString != null && !processorName.Contains(frequencyString))
             {
                 // show Max only if there's already a frequency name to differentiate the two
diff --git a/src/Perfolizer/Perfolizer/Phd/Base/IPhdDisplay.cs b/src/Perfolizer/Perfolizer/Phd/Base/IPhdDisplay.cs
deleted file mode 100644
index 45de03a..0000000
--- a/src/Perfolizer/Perfolizer/Phd/Base/IPhdDisplay.cs
+++ /dev/null
@@ -1,6 +0,0 @@
-namespace Perfolizer.Phd.Base;
-
-public interface IPhdDisplay
-{
-    string Display { get; set; }
-}
\ No newline at end of file
diff --git a/src/Perfolizer/Perfolizer/Phd/Base/PhdEntry.cs b/src/Perfolizer/Perfolizer/Phd/Base/PhdEntry.cs
index 5946df1..c3b673e 100644
--- a/src/Perfolizer/Perfolizer/Phd/Base/PhdEntry.cs
+++ b/src/Perfolizer/Perfolizer/Phd/Base/PhdEntry.cs
@@ -6,8 +6,6 @@ namespace Perfolizer.Phd.Base;
 
 public class PhdEntry : PhdObject
 {
-    private PhdEntry? parent;
-
     /// <summary>
     /// Service information (like the structure of the reports)
     /// </summary>
@@ -57,19 +55,6 @@ public class PhdEntry : PhdObject
     public double? Value { get; set; }
     public MeasurementUnit Unit { get; set; } = NumberUnit.Instance;
 
-    // TODO: Support
-    public int? IterationIndex { get; set; }
-
-    public long? InvocationCount { get; set; }
-    // public DateTimeOffset? StartTimestamp { get; set; }
-    // public DateTimeOffset? EndTimestamp { get; set; }
-    // public string? Marker { get; set; }
-    //
-    // /// <summary>
-    // /// Examples: mean, median, min, max, p0, p25, p75, p100
-    // /// </summary>
-    // public string? Aggregator { get; set; }
-
     private readonly List<PhdEntry> children = [];
     public IReadOnlyList<PhdEntry> Children => children;
 
@@ -84,23 +69,10 @@ public class PhdEntry : PhdObject
     public PhdEntry Add(params PhdEntry[] entries)
     {
         foreach (var entry in entries)
-        {
             children.Add(entry);
-            entry.parent = this;
-        }
         return this;
     }
 
-    public bool Remove(PhdEntry entry)
-    {
-        if (entry.parent == this && children.Remove(entry))
-        {
-            entry.parent = null;
-            return true;
-        }
-        return false;
-    }
-
     public IEnumerable<PhdEntry> Traverse()
     {
         yield return this;
diff --git a/src/Perfolizer/Perfolizer/Phd/Dto/PhdCpu.cs b/src/Perfolizer/Perfolizer/Phd/Dto/PhdCpu.cs
index 4977654..ce2c4b6 100644
--- a/src/Perfolizer/Perfolizer/Phd/Dto/PhdCpu.cs
+++ b/src/Perfolizer/Perfolizer/Phd/Dto/PhdCpu.cs
@@ -14,12 +14,10 @@ public class PhdCpu : PhdObject
     public int? LogicalCoreCount { get; set; }
     public string? Architecture { get; set; }
     public long? NominalFrequencyHz { get; set; }
-    public long? MinFrequencyHz { get; set; }
     public long? MaxFrequencyHz { get; set; }
 
-    public Frequency? GetNominalFrequency() => NominalFrequencyHz.HasValue ? Frequency.FromHz(NominalFrequencyHz.Value) : null;
-    public Frequency? GetMinFrequency() => MinFrequencyHz.HasValue ? Frequency.FromHz(MinFrequencyHz.Value) : null;
-    public Frequency? GetMaxFrequency() => MaxFrequencyHz.HasValue ? Frequency.FromHz(MaxFrequencyHz.Value) : null;
+    public Frequency? NominalFrequency() => NominalFrequencyHz.HasValue ? Frequency.FromHz(NominalFrequencyHz.Value) : null;
+    public Frequency? MaxFrequency() => MaxFrequencyHz.HasValue ? Frequency.FromHz(MaxFrequencyHz.Value) : null;
 
     public PhdCpu SetDisplay()
     {
diff --git a/src/Perfolizer/Perfolizer/Phd/TODO.md b/src/Perfolizer/Perfolizer/Phd/TODO.md
index fd7ea82..8864feb 100644
--- a/src/Perfolizer/Perfolizer/Phd/TODO.md
+++ b/src/Perfolizer/Perfolizer/Phd/TODO.md
@@ -4,4 +4,5 @@
 * Analysers
 * Import old jobs
 * GC
-* Unit: RPS
\ No newline at end of file
+* Unit: RPS
+* Rename: Children -> Nested
\ No newline at end of file