+The **frequency domain** represents a [Signal](/wiki/Signal) by its constituent frequencies, revealing the spectrum of harmonic components rather than its evolution over [Time](/wiki/Time). This perspective is crucial for analyzing periodic phenomena, filtering, and understanding the intrinsic rhythm of data.
+## See also
+- [Fourier Transform](/wiki/Fourier_Transform)
+- [Time Domain](/wiki/Time_Domain)
+- [Spectrum](/wiki/Spectrum)
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